APA Edition Citation

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

Chicago Edition Citation

Pettofrezzo, Anthony J., and Donald R. Byrkit. Elements of Number Theory. 1970.

MLA Edition Citation

Pettofrezzo, Anthony J., and Donald R. Byrkit. Elements of Number Theory. 1970.

Warning: These citations may not always be 100% accurate.