एपीए उद्धरण

(1980). Petroleum committee: Nine session, Geneva, 1980: General report. Geneva, Switzerland: International Labour Office.

शिकागो स्टाइल उद्धरण

Petroleum Committee: Nine Session, Geneva, 1980: General Report. Geneva, Switzerland: International Labour Office, 1980.

एमएलए उद्धरण

Petroleum Committee: Nine Session, Geneva, 1980: General Report. Geneva, Switzerland: International Labour Office, 1980.