Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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