APA (7. basım) Alıntı

Von Hagen, V. W. (1949). Ecuador and the Galápagos Islands (First edition.). University of Oklahoma Press.

Chicago Style (17. basım) Atıf

Von Hagen, Víctor Wolfgang. Ecuador and the Galápagos Islands. First edition. Norman: University of Oklahoma Press, 1949.

MLA (8th ed.) Atıf

Von Hagen, Víctor Wolfgang. Ecuador and the Galápagos Islands. First edition. University of Oklahoma Press, 1949.