Παραπομπή APA

Pettofrezzo, A. J., & Byrkit, D. R. (1970). Elements of number theory. Prentice Hall.

Παραπομπή Chicago Style

Pettofrezzo, Anthony J., και Donald R. Byrkit. Elements of Number Theory. London: Prentice Hall, 1970.

Παραπομπή MLA

Pettofrezzo, Anthony J., και Donald R. Byrkit. Elements of Number Theory. Prentice Hall, 1970.