Παραπομπή APA

Bowen, R. (1977). Copper: Its geology and economics. Applied Science Publishers.

Παραπομπή Chicago Style

Bowen, Robert. Copper: Its Geology and Economics. London: Applied Science Publishers, 1977.

Παραπομπή MLA

Bowen, Robert. Copper: Its Geology and Economics. Applied Science Publishers, 1977.