References

Make sure every reference in the text tallies with the references list or bibliography at the end of the work, especially the date of publication.

Author

When the same author has published more than one cited work in the same year, you can avoid ambiguity by adding ‘a’, ‘b’, etc. to the year of publication (Jones, 1999b).
If there are two authors, give the surnames of both before the date. ‘…effects of positive reinforcement (De Vries and Magnon, 1995)’.
For references with more than two authors, give the name of the first author, followed by ‘et al’, in the text (Jones et al, 2004) ‘Three investigations (Lloyd Evans et al, 1989).
Separate different publications with a semicolon (Densch and Lindberg, 1997; Ribero et al, 2000).
If there are references by two different authors with the same surname, avoid ambiguity by including their initials in the text reference: (P. Blanc, 1986; L. Blanc, 1978).

If the work has been produced by an organisation (say, Eurostat) and the author’s name is not given, use the name of the organisation in place of the author’s name (Eurostat, 2002).
Use the abbreviated form of such organisations if possible when citing them in the text: (ILO, 1998), and list them alphabetically by the abbreviated form in the list of references. However, the full name should be given in brackets in the references list: ILO (International Labour Organisation), The future of urban employment, Geneva, ILO, 1998.
Note that where there is no accepted abbreviation for an organisation (e.g. European Commission) you must write out the name of the organisations in full (European Foundation for the Improvement of Living and Working Conditions, 2001).

For unpublished theses, use the form: ‘The work of Rogers (unpublished thesis, 1995) has led us to query…’ Give more details in the list of references.
For works you know are in the process of being published, use the form: (Cappelli, in press).
In the list of references, give as many details as possible. When your manuscript is in proof, remember to check whether the work has been published yet. If so, update the reference both in your text and in your list of references!

Only include the page numbers in the reference if this is helpful for the reader: (Smyth, 2002, pp. 31–35). The correct range connector here is an en dash.
If different parts of a document are cited at different points in the text, give the appropriate page or section numbers in the text. ‘Vasquez (2002, p. 73) shows’