Gaya APA

Chanlett, E., T. (1973). Environmental protection . Xvi, 569 P : Tabl, Illus; 23 C: McGraw - Hill Book Company.

Gaya MLA

Chanlett, E., T.. Environmental protection. Xvi, 569 P : Tabl, Illus; 23 C: McGraw - Hill Book Company, 1973. Text.