APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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