Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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