APA (7. basım) Alıntı

Geer, H. T. (1955). Charging systems. American Library Association.

Chicago Style (17. basım) Atıf

Geer, Helen Thornton. Charging Systems. Chicago: American Library Association, 1955.

MLA (9th ed.) Atıf

Geer, Helen Thornton. Charging Systems. American Library Association, 1955.