Cita APA (7th ed.)

Nebel, B. J., & Wright, R. T. (1996). Environmental science (Seventh edition.). Prentice Hall.

Cita Chicago (17th ed.)

Nebel, Bernard J., i Richard T. Wright. Environmental Science. Seventh edition. Upper Saddle River, N.J: Prentice Hall, 1996.

Cita MLA (9th ed.)

Nebel, Bernard J., i Richard T. Wright. Environmental Science. Seventh edition. Prentice Hall, 1996.