Cita APA (7th ed.)

Gumerman, R. C., Burris, B. E., & Hansen, S. P. (1986). Small water system treatment costs. Noyes Data Corporation.

Cita Chicago (17th ed.)

Gumerman, Robert C., Bruce E. Burris, i Sigurd P. Hansen. Small Water System Treatment Costs. Park Ridge: Noyes Data Corporation, 1986.

Cita MLA (9th ed.)

Gumerman, Robert C., et al. Small Water System Treatment Costs. Noyes Data Corporation, 1986.