Παραπομπή APA

Rich, B. (1960). Principles and problems of elementary algebra. McGraw Hill.

Παραπομπή Chicago Style

Rich, Barnett. Principles and Problems of Elementary Algebra. New Delhi: McGraw Hill, 1960.

Παραπομπή MLA

Rich, Barnett. Principles and Problems of Elementary Algebra. McGraw Hill, 1960.