Παραπομπή σε μορφή APA (7η εκδ.)

Schomaker, N. B., & Zunt, D. A. (1989). Guidance documents relating to landfills and contaminants. Environmental Protection Agency.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Schomaker, Norbert B., και Donna A. Zunt. Guidance Documents Relating to Landfills and Contaminants. Cincinnati: Environmental Protection Agency, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Schomaker, Norbert B., και Donna A. Zunt. Guidance Documents Relating to Landfills and Contaminants. Environmental Protection Agency, 1989.