Citazione Stile APA (7a Edizione)
Irion, T. W. (1925). Comprehension Difficulties of ninth grade students in the study of literature.
Citazione stile Chigago Style (17a edizione)
Irion, Theo W.H. Comprehension Difficulties of Ninth Grade Students in the Study of Literature. New York, 1925.
Citatione MLA (9a ed.)
Irion, Theo W.H. Comprehension Difficulties of Ninth Grade Students in the Study of Literature. 1925.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.