Cita APA (7a ed.)

Walker, H. M., & Lev, J. (1958). Elementary statistical methods. Holt, Rinehart and Winston.

Cita Chicago Style (17a ed.)

Walker, Helen Mary, y Joseph Lev. Elementary Statistical Methods. New York: Holt, Rinehart and Winston, 1958.

Cita MLA (9a ed.)

Walker, Helen Mary, y Joseph Lev. Elementary Statistical Methods. Holt, Rinehart and Winston, 1958.