APA aipamena

Walford, A. J. (1970). Guide to reference material (2nd ed.). The Library Association.

Chicago Style aipamena

Walford, A J. Guide to Reference Material. 2nd ed. London: The Library Association, 1970.

MLA aipamena

Walford, A J. Guide to Reference Material. 2nd ed. The Library Association, 1970.