Cita APA (7th ed.)

FREUND, J. E. (1981). Modern elementary statistics.-- ed.5. Prentice-Hall of India.

Cita Chicago (17th ed.)

FREUND, John E. Modern Elementary Statistics.-- Ed.5. New Delhi: Prentice-Hall of India, 1981.

Cita MLA (9th ed.)

FREUND, John E. Modern Elementary Statistics.-- Ed.5. Prentice-Hall of India, 1981.