Não informado. (1981). Ground Water Monitoring Review. Water Well Journal Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Ground Water Monitoring Review. Worthington, Ohio: Water Well Journal Publishing, 1981.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Ground Water Monitoring Review. Water Well Journal Publishing, 1981.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.