APA aipamena

Hawkins, A. (1997). The improving profitability pocketbook. Management Pocketbooks.

Chicago Style aipamena

Hawkins, Anne. The Improving Profitability Pocketbook. Hants, U.K: Management Pocketbooks, 1997.

MLA aipamena

Hawkins, Anne. The Improving Profitability Pocketbook. Management Pocketbooks, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.