Brelin, H. K. D. (1995). Focused Quality.
Cita Chicago (17th ed.)Brelin, Harvey K; Davenport. Focused Quality. 1995.
Cita MLA (9th ed.)Brelin, Harvey K; Davenport. Focused Quality. 1995.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)