Παραπομπή APA

Eynden, C. V. (1970). Number theory: An introduction to proof.

Παραπομπή Chicago Style

Eynden, Charles Vanden. Number Theory: An Introduction to Proof. International Textbook Co., Pennsylvania, 1970.

Παραπομπή MLA

Eynden, Charles Vanden. Number Theory: An Introduction to Proof. 1970.