Παραπομπή σε μορφή APA (7η εκδ.)

Williams, J. (1966). Library statistics: A handbook of concepts, definitions, and termi- nology. American Library Association.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Williams, Joel. Library Statistics: A Handbook of Concepts, Definitions, and Termi- Nology. Chicago: American Library Association, 1966.

Παραπομπή σε μορφή MLA (8th εκδ.)

Williams, Joel. Library Statistics: A Handbook of Concepts, Definitions, and Termi- Nology. American Library Association, 1966.