Cita APA (7th ed.)

Richards, L. E. (1978). Business statistics: Why and when. McGraw - Hill.

Cita Chicago (17th ed.)

Richards, Larry E. Business Statistics: Why and When. New York: McGraw - Hill, 1978.

Cita MLA (9th ed.)

Richards, Larry E. Business Statistics: Why and When. McGraw - Hill, 1978.