Cita APA (7a ed.)

Downie, N., & Heath, R. (1974). Basic statistical methods (4th ed.). Harper & Row.

Cita Chicago Style (17a ed.)

Downie, N.M, y R.W Heath. Basic Statistical Methods. 4th ed. New York [etc.]: Harper & Row, 1974.

Cita MLA (9a ed.)

Downie, N.M, y R.W Heath. Basic Statistical Methods. 4th ed. Harper & Row, 1974.