Παραπομπή APA

Ragan, D. M. (1968). Structural geology: Fourth Edition. John wiley.

Παραπομπή Chicago Style

Ragan, Donal M. Structural Geology: Fourth Edition. New york: John wiley, 1968.

Παραπομπή MLA

Ragan, Donal M. Structural Geology: Fourth Edition. John wiley, 1968.