Cita APA (7a ed.)

Freund, J. E., & Williams, F. J. (1959). Modern business statistics. Prentice-Hall.

Cita Chicago Style (17a ed.)

Freund, John E., y Frank Jefferson Williams. Modern Business Statistics. Englewood Cliffs, New Jersey: Prentice-Hall, 1959.

Cita MLA (9a ed.)

Freund, John E., y Frank Jefferson Williams. Modern Business Statistics. Prentice-Hall, 1959.