APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Guba, Egon G., and Yvonna S. Lincoln. Fourth Generation Evaluation. Newbury Park, Calif.: Sage Publications, 1989.

MLA (9th ed.) Citation

Guba, Egon G., and Yvonna S. Lincoln. Fourth Generation Evaluation. Sage Publications, 1989.