Cita APA (7th ed.)

Freund, J. E., Williams, F. J., Perles, B. M., & Sullivan, C. (1969). Freund and Williams' Modern business statistics. Prentice-Hall.

Cita Chicago (17th ed.)

Freund, John E., Frank Jefferson Williams, Benjamin M. Perles, i Charles Sullivan. Freund and Williams' Modern Business Statistics. Englewood Cliffs, N.J: Prentice-Hall, 1969.

Cita MLA (9th ed.)

Freund, John E., et al. Freund and Williams' Modern Business Statistics. Prentice-Hall, 1969.