APA (7th ed.) Zitazioa
(1974). METRO-APEX Volume 7.1: Air Pollution Control Officer's Manual. Revised. ERIC, Resources in Education (RIE).
Chicago Style (17th ed.) Zitazioa
"METRO-APEX Volume 7.1: Air Pollution Control Officer's Manual. Revised." ERIC, Resources in Education (RIE) 1974.
MLA (9th ed.) Zitazioa
"METRO-APEX Volume 7.1: Air Pollution Control Officer's Manual. Revised." ERIC, Resources in Education (RIE), 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.