Cita APA (7a ed.)

Water Environment Federation. (1992). Sludge digest (1a ed.). Water Environment Federation.

Cita Chicago Style (17a ed.)

Water Environment Federation. Sludge Digest. 1a ed. United States: Water Environment Federation, 1992.

Cita MLA (9a ed.)

Water Environment Federation. Sludge Digest. 1a ed. Water Environment Federation, 1992.