Gaya APA

Harbeck, R, M., Johnson, L, K. (1965). Earth and Space Science (Cet. 1.--). New York: Holt, Rinehart & Winston.

Gaya MLA

Harbeck, Richard, M.., Johnson, Lloyd, K.. "Earth and Space Science". Cet. 1.-- New York: Holt, Rinehart & Winston, 1965. Text.