Παραπομπή APA

Pettijohn, F. J. (1957). Sedimentary rocks. Oxford University.

Παραπομπή Chicago Style

Pettijohn, F. J. Sedimentary Rocks. Calcutta: Oxford University, 1957.

Παραπομπή MLA

Pettijohn, F. J. Sedimentary Rocks. Oxford University, 1957.