Cita APA (7th ed.)

(1966). Guide to reference material (2nd ed.). Library Association.

Cita Chicago (17th ed.)

Guide to Reference Material. 2nd ed. [London]: Library Association, 1966.

Cita MLA (9th ed.)

Guide to Reference Material. 2nd ed. Library Association, 1966.

Atenció: Aquestes cites poden no estar 100% correctes.