एपीए उद्धरण

Chang, G., & Sederberg, T. W. (1997). Over and over again. Mathematical Association of America.

शिकागो स्टाइल उद्धरण

Chang, Gengzhe, और Thomas W. Sederberg. Over and over Again. [Washington, DC]: Mathematical Association of America, 1997.

एमएलए उद्धरण

Chang, Gengzhe, और Thomas W. Sederberg. Over and over Again. Mathematical Association of America, 1997.