Fraenkel, J. R., & Wallen, N. E. (2019). How to design and evaluate research in education. McGraw-Hill.
Citazione stile Chigago Style (17a edizione)Fraenkel, Jack R., e Norman E. Wallen. How to Design and Evaluate Research in Education. Boston: McGraw-Hill, 2019.
Citatione MLA (9a ed.)Fraenkel, Jack R., e Norman E. Wallen. How to Design and Evaluate Research in Education. McGraw-Hill, 2019.