Chen, H. (1990). Theory-driven evaluation. Sage.
Chicago Style aipamenaChen, Huey-Tsyh. Theory-driven Evaluation. Newburry Park, Calif: Sage, 1990.
MLA aipamenaChen, Huey-Tsyh. Theory-driven Evaluation. Sage, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.