Παραπομπή APA

Geological society of America. (1888). Geological society of America bulletin. Geological society of America.

Παραπομπή Chicago Style

Geological society of America. Geological Society of America Bulletin. Colorado: Geological society of America, 1888.

Παραπομπή MLA

Geological society of America. Geological Society of America Bulletin. Geological society of America, 1888.