APA استشهاد

Ahrens, L. H., & Rankama, K. (1956). Physics and chemistry of the earth: :v.1. Pergamon press.

استشهاد بنمط شيكاغو

Ahrens, L. H., و Kalervo Rankama. Physics and Chemistry of the Earth: :v.1. London: Pergamon press, 1956.

MLA استشهاد

Ahrens, L. H., و Kalervo Rankama. Physics and Chemistry of the Earth: :v.1. Pergamon press, 1956.