Citazione Stile APA (7a Edizione)

Hutchins, M. (1944). Introduction to reference work. American Library Association.

Citazione stile Chigago Style (17a edizione)

Hutchins, Margaret. Introduction to Reference Work. Chicago: American Library Association, 1944.

Citatione MLA (9a ed.)

Hutchins, Margaret. Introduction to Reference Work. American Library Association, 1944.