Cita APA (7a ed.)

Anderson, E., & Exman, E. (1955). The world of Albert Schweitzer: A book of photographs. Harper.

Cita Chicago Style (17a ed.)

Anderson, Erica, y Eugene Exman. The World of Albert Schweitzer: A Book of Photographs. New York: Harper, 1955.

Cita MLA (9a ed.)

Anderson, Erica, y Eugene Exman. The World of Albert Schweitzer: A Book of Photographs. Harper, 1955.