Gaya APA

al., E. et al (1981). Effective Evaluation: Improving The Usefulness Of Evaluation Results Throuhg Responsive And Naturalistic Approaches (-). San Francisco: Jossey-Bass Publishers.

Gaya MLA

al., Et. et al. "Effective Evaluation: Improving The Usefulness Of Evaluation Results Throuhg Responsive And Naturalistic Approaches". - San Francisco: Jossey-Bass Publishers, 1981. Text.