Dyfyniad APA

Reed, S. C., Crites, R. W., & Middlebrooks, E. J. (1995). Natural systems for waste management and treatment (2nd ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Reed, Sherwood C., Ronald W. Crites, and E. Joe Middlebrooks. Natural Systems for Waste Management and Treatment. 2nd ed. New York: McGraw-Hill, 1995.

Dyfyniad MLA

Reed, Sherwood C., et al. Natural Systems for Waste Management and Treatment. 2nd ed. McGraw-Hill, 1995.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.