Gaya APA

PIPKIN, B, ;, T, D, ;, H, R, ;, B, P. (2011). Geology and The Environment. 6th. edition. Internatioanl Edition . : Brooks/Cole.

Gaya MLA

PIPKIN, Bernard, ;, TRENT,, D.D., ;, HAZLETT,, Richard, ;, BIERMAN,, Paul. "Geology and The Environment. 6th. edition. Internatioanl Edition". : Brooks/Cole, 2011. Buku.