Popham, W. J. (1988). Educational evaluation (Second edition.). Prentice Hall.
Citazione stile Chigago Style (17a edizione)Popham, W. James. Educational Evaluation. Second edition. Englewood Cliffs, New Jersey: Prentice Hall, 1988.
Citatione MLA (9a ed.)Popham, W. James. Educational Evaluation. Second edition. Prentice Hall, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.