APA aipamena

Brelin, H. K. D. (1995). Focused Quality.

Chicago Style aipamena

Brelin, Harvey K; Davenport. Focused Quality. 1995.

MLA aipamena

Brelin, Harvey K; Davenport. Focused Quality. 1995.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.