Citazione APA

Ray Prytherch, Anthony Chalcraft, & Stephen Willis. (1998). Walford's guide to reference material(v.3) (7 th ed.). Library Association.

Stile di citazione Chicago

Ray Prytherch, Anthony Chalcraft, e Stephen Willis. Walford's Guide to Reference Material(v.3). 7 th ed. London: Library Association, 1998.

Citazione MLA

Ray Prytherch, et al. Walford's Guide to Reference Material(v.3). 7 th ed. Library Association, 1998.