APA-referens

Katz, W. A. (1974). Introduction to reference book: Reference services and reference processes (2nd ed.). McGraw-Hill.

Chicago-stil citat

Katz, Willaim A. Introduction to Reference Book: Reference Services and Reference Processes. 2nd ed. New York: McGraw-Hill, 1974.

MLA-referens

Katz, Willaim A. Introduction to Reference Book: Reference Services and Reference Processes. 2nd ed. McGraw-Hill, 1974.