Press, F., & Siever, R. (1986). Earth (4a. ed.). W. H. Freeman.
Chicago Style (17th ed.) CitationPress, Frank, and Raymond Siever. Earth. 4a. ed. Nueva York: W. H. Freeman, 1986.
MLA (9th ed.) CitationPress, Frank, and Raymond Siever. Earth. 4a. ed. W. H. Freeman, 1986.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.