APA aipamena

Humble, J. (1967). Improving business result. Mc Graw Hill.

Chicago Style aipamena

Humble, John. Improving Business Result. London: Mc Graw Hill, 1967.

MLA aipamena

Humble, John. Improving Business Result. Mc Graw Hill, 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.