Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.