The usual style is the author/date system. In the text cite Jones and Smith (1989) reported that ... Several workers (Jones and Smith, 1989; 1990; Taylor, 1990; Green et al., 1992) noted that ... Commas between author and date are optional; semi-colons separate references. Use et al. (in italics or underlined) for more than two authors; cite papers in order by date of publication. Cite unpublished work as Jones (unpublished, 1990). Refer to personal communications that are not generally available (for example, a letter or a conversation) as Jones (personal communication, 1990). List all citations alphabetically then in order of publication in a 'List of References' placed immediately following the text. For each reference, list the name and initials of each author, the date of publication, the full title, the full source including volume and page numbers (do not cite the issue of a journal (No. x) if page numbering for a given volume uniquely locates the paper). For books and monographs list the editor or editors, the publisher, and the place of publication, but generally not the number of pages if an entire volume is cited. For material obtained from the Internet, follow the format above as far as possible: list the source (e.g. the person or agency posting the web-page), the date, the title of the source (e.g. of the web-page) and the internet address where the information was obtained. List unpublished work by the date and indicate, for example, unpublished manuscript as part of the source. Do not list personal communications. Do not abbreviate. Within this general framework, almost every journal or book has a slightly different style. Consult one that suits you and be consistent throughout your list. Check each reference for accuracy against the original.