Παραπομπή σε μορφή APA (7η εκδ.)

Zickefoose, C. (1976). Anaerobic sludge digestion: Operations manual. Office of Water Program Operations, U.S. Environmental Protection Agency.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zickefoose, Chuck. Anaerobic Sludge Digestion: Operations Manual. Washington: Office of Water Program Operations, U.S. Environmental Protection Agency, 1976.

Παραπομπή σε μορφή MLA (9th εκδ.)

Zickefoose, Chuck. Anaerobic Sludge Digestion: Operations Manual. Office of Water Program Operations, U.S. Environmental Protection Agency, 1976.