Παραπομπή APA

Hancock, P. L., & Skinner, B. J. (2000). Oxford companion to the Earth. Oxford University Press.

Παραπομπή Chicago Style

Hancock, Paul Land, και Brian J. Skinner. Oxford Companion to the Earth. Oxford: Oxford University Press, 2000.

Παραπομπή MLA

Hancock, Paul Land, και Brian J. Skinner. Oxford Companion to the Earth. Oxford University Press, 2000.