Cita APA (7th ed.)

Downie, N., & Heath, R. W. (1970). Basic statistical methods (3rd ed.). Harper & Row.

Cita Chicago (17th ed.)

Downie, N.M, i R. W. Heath. Basic Statistical Methods. 3rd ed. New York: Harper & Row, 1970.

Cita MLA (9th ed.)

Downie, N.M, i R. W. Heath. Basic Statistical Methods. 3rd ed. Harper & Row, 1970.