Παραπομπή APA

Freund, J. E., & Perles, B. M. (1999). Statistics a first course (7th ed.). Prentice-Hall of India.

Παραπομπή Chicago Style

Freund, John E., και Benjamin M. Perles. Statistics a First Course. 7th ed. London: Prentice-Hall of India, 1999.

Παραπομπή MLA

Freund, John E., και Benjamin M. Perles. Statistics a First Course. 7th ed. Prentice-Hall of India, 1999.