एपीए उद्धरण

Barr, M. (2002). Acyclic models. American Mathematical Society.

शिकागो स्टाइल उद्धरण

Barr, Michael. Acyclic Models. Providence, R.I.: American Mathematical Society, 2002.

एमएलए उद्धरण

Barr, Michael. Acyclic Models. American Mathematical Society, 2002.