Cita APA (7a ed.)

Secrist, H. (1920). An introduction to statistical methods. MacMillan.

Cita Chicago Style (17a ed.)

Secrist, Horace. An Introduction to Statistical Methods. New York: MacMillan, 1920.

Cita MLA (8a ed.)

Secrist, Horace. An Introduction to Statistical Methods. MacMillan, 1920.