Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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