Gaya APA

Southwick, C, H. (1976). Ecology and quality of our environment second edition (Edisi 2 Cet 1). New York: Litton Educational Publishing.

Gaya MLA

Southwick, Charles, H.. "Ecology and quality of our environment second edition". Edisi 2 Cet 1 New York: Litton Educational Publishing, 1976. Text.