एपीए उद्धरण

Bell, L., & Copeland, A. (2018). Coal coke and coal chemicals. ETP.

शिकागो स्टाइल उद्धरण

Bell, Luke, और Ash Copeland. Coal Coke and Coal Chemicals. ETP, 2018.

एमएलए उद्धरण

Bell, Luke, और Ash Copeland. Coal Coke and Coal Chemicals. ETP, 2018.