Fraenkel, J. R., & Wallen, N. E. (1996). How to design and evaluate research in education (Third edition.). McGraw-Hill.
Citazione stile Chigago Style (17a edizione)Fraenkel, Jack R., e Norman E. Wallen. How to Design and Evaluate Research in Education. Third edition. New York: McGraw-Hill, 1996.
Citatione MLA (8a ed.)Fraenkel, Jack R., e Norman E. Wallen. How to Design and Evaluate Research in Education. Third edition. McGraw-Hill, 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.