APA aipamena

GUBA, E. G. (1981). Effective Evaluation. Jossey Bass Classic.

Chicago Style aipamena

GUBA, Egon G. Effective Evaluation. Jossey Bass Classic, 1981.

MLA aipamena

GUBA, Egon G. Effective Evaluation. Jossey Bass Classic, 1981.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.