American Institute of Professional Geologists. (1979). The Professional geologist. American Institute of Professional Geologists.
Citace podle Chicago (17th ed.)American Institute of Professional Geologists. The Professional Geologist. [Golden, Colo.]: American Institute of Professional Geologists, 1979.
Citace podle MLA (9th ed.)American Institute of Professional Geologists. The Professional Geologist. American Institute of Professional Geologists, 1979.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..