Cita APA (7a ed.)

Willoughby, S. S. (1968). Probability and statistics. Silver Burdett.

Cita Chicago Style (17a ed.)

Willoughby, Stephen S. Probability and Statistics. Morristown: Silver Burdett, 1968.

Cita MLA (9a ed.)

Willoughby, Stephen S. Probability and Statistics. Silver Burdett, 1968.