Citazione Stile APA (7a Edizione)

Fries, C. (1945). Teaching and learning english as a foreing languaje. University of Michigan.

Citazione stile Chigago Style (17a edizione)

Fries, Charles. Teaching and Learning English as a Foreing Languaje. Ann Arbor: University of Michigan, 1945.

Citatione MLA (9a ed.)

Fries, Charles. Teaching and Learning English as a Foreing Languaje. University of Michigan, 1945.