Gaya APA

Grosvenor, G, M. (1985). National Geographic: Hazardous Waste Storing Up Trouble 318 (Vol. 167, No. 3 Maret 1985). : National Geographic Society.

Gaya MLA

Grosvenor, Gilbert, M.. "National Geographic: Hazardous Waste Storing Up Trouble 318". Vol. 167, No. 3 Maret 1985 : National Geographic Society, 1985. Text.