Παραπομπή σε μορφή APA (7η εκδ.)

Water Pollution Control Federation. (1980). WPCF wastewater treatment plant operator training program basic course, student workbook. The Federation.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Water Pollution Control Federation. WPCF Wastewater Treatment Plant Operator Training Program Basic Course, Student Workbook. Washington, D.C.: The Federation, 1980.

Παραπομπή σε μορφή MLA (9th εκδ.)

Water Pollution Control Federation. WPCF Wastewater Treatment Plant Operator Training Program Basic Course, Student Workbook. The Federation, 1980.