Citazione Stile APA (7a Edizione)

Bullard, F. M. (1976). Volcanoes of the Earth (Revised edition.). University of Texas Press.

Citazione stile Chigago Style (17a edizione)

Bullard, Fred M. Volcanoes of the Earth. Revised edition. Austin, Texas: University of Texas Press, 1976.

Citatione MLA (9a ed.)

Bullard, Fred M. Volcanoes of the Earth. Revised edition. University of Texas Press, 1976.