Pollard, C. W. (1996). The soul of the firm. New York: Harper Business.
Chicago Style aipamenaPollard, C. William. The Soul of the Firm. New York: Harper Business, 1996.
MLA aipamenaPollard, C. William. The Soul of the Firm. New York: Harper Business, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.