Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.