Gaya APA

Utgard, R, O., McKenzie, G, D. (1974). Man's Finite Earth (Ed. 1). Minnesota: Burgess Pubishing Company.

Gaya MLA

Utgard, Russell, O.., McKenzie, Garry, D.. "Man's Finite Earth". Ed. 1 Minnesota: Burgess Pubishing Company, 1974. Text.