APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.