Citazione Stile APA (7a Edizione)

Alexander, L. G. (1967). Question and answer: Graded oral comprehension exercises (1a. ed.). Longman.

Citazione stile Chigago Style (17a edizione)

Alexander, Louis George. Question and Answer: Graded Oral Comprehension Exercises. 1a. ed. Londres: Longman, 1967.

Citatione MLA (9a ed.)

Alexander, Louis George. Question and Answer: Graded Oral Comprehension Exercises. 1a. ed. Longman, 1967.