APA (7th ed.) Zitazioa
Needle, D. Business in context: An introduction to business and its environment. Cengage.
Chicago Style (17th ed.) Zitazioa
Needle, David. Business in Context: An Introduction to Business and Its Environment. Cengage.
MLA (9th ed.) Zitazioa
Needle, David. Business in Context: An Introduction to Business and Its Environment. Cengage.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.