Cita APA (7th ed.)

Guba, E. G., & Lincoln , Y. S. (1989). Fourth generation evaluation. SAGE Publications.

Cita Chicago (17th ed.)

Guba, Egon G., i Yvonna S. Lincoln. Fourth Generation Evaluation. California: SAGE Publications, 1989.

Cita MLA (9th ed.)

Guba, Egon G., i Yvonna S. Lincoln. Fourth Generation Evaluation. SAGE Publications, 1989.