एपीए उद्धरण

Bachmann, O. (1981). On rank 4 projective planes. Hindawi Limited.

शिकागो स्टाइल उद्धरण

Bachmann, O. On Rank 4 Projective Planes. Hindawi Limited, 1981.

एमएलए उद्धरण

Bachmann, O. On Rank 4 Projective Planes. Hindawi Limited, 1981.