Παραπομπή σε μορφή APA (7η εκδ.)

U.S. Environmental Protection Agency. Principles of design and operations of wastewater treatment pond systems for plant operators, engineers, and managers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

U.S. Environmental Protection Agency. Principles of Design and Operations of Wastewater Treatment Pond Systems for Plant Operators, Engineers, and Managers.

Παραπομπή σε μορφή MLA (9th εκδ.)

U.S. Environmental Protection Agency. Principles of Design and Operations of Wastewater Treatment Pond Systems for Plant Operators, Engineers, and Managers.