Παραπομπή σε μορφή APA (7η εκδ.)

Dietrich, R. V., & Skinner, B. J. (1990). Gems, granites, and gravels: Knowing and using rocks and minerals. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Dietrich, Richard Vincent, και Brian J. Skinner. Gems, Granites, and Gravels: Knowing and Using Rocks and Minerals. Cambridge: Cambridge University Press, 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

Dietrich, Richard Vincent, και Brian J. Skinner. Gems, Granites, and Gravels: Knowing and Using Rocks and Minerals. Cambridge University Press, 1990.