Bettinghaus, E. P. (1966). Message preparation; the nature of proof. Bobbs-Merril.
Chicago Style (17th ed.) CitationBettinghaus, Erwin Paul. Message Preparation; the Nature of Proof. Indianapolis: Bobbs-Merril, 1966.
MLA (9th ed.) CitationBettinghaus, Erwin Paul. Message Preparation; the Nature of Proof. Bobbs-Merril, 1966.
Warning: These citations may not always be 100% accurate.