APA استشهاد

Hayes,Rick Stephan. (1979). Credit and collections: A practical guide. CBI Publishing.

استشهاد بنمط شيكاغو

Hayes,Rick Stephan. Credit and Collections: A Practical Guide. Boston: CBI Publishing, 1979.

MLA استشهاد

Hayes,Rick Stephan. Credit and Collections: A Practical Guide. CBI Publishing, 1979.