Cita APA

Downie, N. M., & Heath, R. W. (1959). Basic statistical methods (3rd ed.). Harper.

Chicago Edition Citation

Downie, N. M., i R. W. Heath. Basic Statistical Methods. 3rd ed. New York: Harper, 1959.

Cita MLA

Downie, N. M., i R. W. Heath. Basic Statistical Methods. 3rd ed. Harper, 1959.