Cita APA (7a ed.)

Utgard, R. O., & McKenzie, G. D. (1974). Man's finite earth. Burgess Pub. Co.

Cita Chicago Style (17a ed.)

Utgard, Russell O., y Garry D. McKenzie. Man's Finite Earth. Minneapolis: Burgess Pub. Co, 1974.

Cita MLA (9a ed.)

Utgard, Russell O., y Garry D. McKenzie. Man's Finite Earth. Burgess Pub. Co, 1974.