एपीए उद्धरण

Christensen, H. B. (1977). Statistics step by step. Houghton.

शिकागो स्टाइल उद्धरण

Christensen, Howard B. Statistics Step by Step. Atlanta: Houghton, 1977.

एमएलए उद्धरण

Christensen, Howard B. Statistics Step by Step. Houghton, 1977.