एपीए उद्धरण

Croom, F. H. Basic concepts of algebraic topology.

शिकागो स्टाइल उद्धरण

Croom, Fred H. Basic Concepts of Algebraic Topology. Spriger- Verlag, New yORK.

एमएलए उद्धरण

Croom, Fred H. Basic Concepts of Algebraic Topology.