Cita APA (7th ed.)

Downie, N. M., & Heath,R.W. (1983). Basic statistical methods (5th ed.). National Book Store.

Cita Chicago (17th ed.)

Downie, Norville M., i Heath,R.W. Basic Statistical Methods. 5th ed. Manila: National Book Store, 1983.

Cita MLA (9th ed.)

Downie, Norville M., i Heath,R.W. Basic Statistical Methods. 5th ed. National Book Store, 1983.