एपीए उद्धरण

Herrnstein, R. J. (1994). The bell curve: Intelligence and class structure in American life. New York: Free Press.

शिकागो स्टाइल उद्धरण

Herrnstein, Richard J. The Bell Curve: Intelligence and Class Structure in American Life. New York: Free Press, 1994.

एमएलए उद्धरण

Herrnstein, Richard J. The Bell Curve: Intelligence and Class Structure in American Life. New York: Free Press, 1994.