Gaya APA

Chiras, D, D. (1988). Environmental Science (SECOND EDITION). MENLO PARK: THE BENJAMIN/CUMMINGS PUBLISHING COMPANY, INC.,.

Gaya MLA

Chiras, Daniel, D.. "Environmental Science". SECOND EDITION MENLO PARK: THE BENJAMIN/CUMMINGS PUBLISHING COMPANY, INC.,, 1988. FAKULTAS ILMU KESEHATAN.