APA (7. basım) Alıntı

Gaddum, L. W., & Knowles, H. L. (1953). Our physical environment: A problem approach. University of Florida.

Chicago Style (17. basım) Atıf

Gaddum, Leonard W., ve Harold L. Knowles. Our Physical Environment: A Problem Approach. Boston, Mass.: University of Florida, 1953.

MLA (9th ed.) Atıf

Gaddum, Leonard W., ve Harold L. Knowles. Our Physical Environment: A Problem Approach. University of Florida, 1953.