APA (7th ed.) Zitazioa
Barrow Collin. (1993). The essence of small business. Prentice Hall Of India.
Chicago Style (17th ed.) Zitazioa
Barrow Collin. The Essence of Small Business. New Delhi: Prentice Hall Of India, 1993.
MLA (9th ed.) Zitazioa
Barrow Collin. The Essence of Small Business. Prentice Hall Of India, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.