Chalcraft, A., Prytherch, R. J., & Willis, S. (1989). Walford's guide to reference material (5th ed.). Library Association.
Chicago Style (17. basım) AtıfChalcraft, Anthony, Raymond John Prytherch, ve Stephen Willis. Walford's Guide to Reference Material. 5th ed. London: Library Association, 1989.
MLA (9th ed.) AtıfChalcraft, Anthony, et al. Walford's Guide to Reference Material. 5th ed. Library Association, 1989.
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