APA (7th ed.) Citation

BETTINGHAUS, E. P. The Nature of Proof. Bobbs-Merrill Educational Publishing.

Chicago Style (17th ed.) Citation

BETTINGHAUS, Erwin P. The Nature of Proof. Bobbs-Merrill Educational Publishing.

MLA (8th ed.) Citation

BETTINGHAUS, Erwin P. The Nature of Proof. Bobbs-Merrill Educational Publishing.

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