Gaya APA

CUNNINGHAM, W, P, C, M, A. (2006). Principles of environmental science inquiry and applications 3rd edition . : McGrawHill-Higher Education.

Gaya MLA

CUNNINGHAM, William, P.;, CUNNINGHAM,, Mary, Ann. "Principles of environmental science inquiry and applications 3rd edition". : McGrawHill-Higher Education, 2006. Buku.