APA aipamena

American Institute of Professional Geologists. (1979). The Professional geologist. American Institute of Professional Geologists.

Chicago Style aipamena

American Institute of Professional Geologists. The Professional Geologist. [Golden, Colo.]: American Institute of Professional Geologists, 1979.

MLA aipamena

American Institute of Professional Geologists. The Professional Geologist. American Institute of Professional Geologists, 1979.