एपीए उद्धरण

Schaffer, J. J. (1976). Geometry of spheres in normed spaces.

शिकागो स्टाइल उद्धरण

Schaffer, Juan Jorge. Geometry of Spheres in Normed Spaces. Marcel Dekker, INC. New York, 1976.

एमएलए उद्धरण

Schaffer, Juan Jorge. Geometry of Spheres in Normed Spaces. 1976.