Cita APA

Packard, L. O. (1953). Geography of the world (Rev. ed.). Macmillan.

Citación estilo Chicago

Packard, Leonard Oscar. Geography of the World. Rev. ed. New York: Macmillan, 1953.

Cita MLA

Packard, Leonard Oscar. Geography of the World. Rev. ed. Macmillan, 1953.