Gaya APA

MERRITTS, D, J, ;, D, W, A, ;, M, K. (1998). Environmental Geology an earth system science approach . : W.H. FREEMAN AND COMPANY.

Gaya MLA

MERRITTS, Dorothy, J., ;, De, WET,, Andrew, ;, MENKING,, Kirsten. "Environmental Geology an earth system science approach". : W.H. FREEMAN AND COMPANY, 1998. Buku.