APA aipamena

Heathfield, D. F. (1987). An introduction to cost and production functions. New York: Macmillan.

Chicago Style aipamena

Heathfield, David F. An Introduction to Cost and Production Functions. New York: Macmillan, 1987.

MLA aipamena

Heathfield, David F. An Introduction to Cost and Production Functions. New York: Macmillan, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.