Citazione Stile APA (7a Edizione)
Willingham, W. W. (1965). Research and development: A report to the trustees of the college entrance examination board.
Citazione stile Chigago Style (17a edizione)
Willingham, Warren W. Research and Development: A Report to the Trustees of the College Entrance Examination Board. 1965.
Citatione MLA (9a ed.)
Willingham, Warren W. Research and Development: A Report to the Trustees of the College Entrance Examination Board. 1965.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.