Cita APA (7th ed.)

Cunningham, W. P. (1999). Environmental encyclopedia (2nd ed.). Gale, Jaico Publishing House.

Cita Chicago (17th ed.)

Cunningham, William P. Environmental Encyclopedia. 2nd ed. Detroit : Mumbai: Gale, Jaico Publishing House, 1999.

Cita MLA (8th ed.)

Cunningham, William P. Environmental Encyclopedia. 2nd ed. Gale, Jaico Publishing House, 1999.