Collins, H. (2006). Winning at collaboration commerce: The next competitive advantage. Amsterdam: Elsevier Butterworth-Heinemann.
Chicago Style aipamenaCollins, Heidi. Winning At Collaboration Commerce: The Next Competitive Advantage. Amsterdam: Elsevier Butterworth-Heinemann, 2006.
MLA aipamenaCollins, Heidi. Winning At Collaboration Commerce: The Next Competitive Advantage. Amsterdam: Elsevier Butterworth-Heinemann, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.