Citazione Stile APA (7a Edizione)

Guba, E. G., & Lincoln, Y. S. (1981). Effective evaluation. Jossey-Bass Publishers.

Citazione stile Chigago Style (17a edizione)

Guba, Egon G., e Yvonna S. Lincoln. Effective Evaluation. San Francisco: Jossey-Bass Publishers, 1981.

Citatione MLA (8a ed.)

Guba, Egon G., e Yvonna S. Lincoln. Effective Evaluation. Jossey-Bass Publishers, 1981.