Gaya APA

Swanson, C, P., Sollers, A, A. (1963). Ours is the earth appraising natural resources and coservation . New York: New York: Holt, Rinehart and Winston; 1963..

Gaya MLA

Swanson, Carl, P.., Sollers, Allan, A.. "Ours is the earth appraising natural resources and coservation". New York: New York: Holt, Rinehart and Winston; 1963., 1963. Text.