Παραπομπή APA

Roger Smith. (1999). Encyclopaedia of geology. Fitzroy Dearborn pub.

Παραπομπή Chicago Style

Roger Smith. Encyclopaedia of Geology. London: Fitzroy Dearborn pub, 1999.

Παραπομπή MLA

Roger Smith. Encyclopaedia of Geology. Fitzroy Dearborn pub, 1999.