APA (7th ed.) Citation

Alexander, L. G., & Ferguson, P. (1977). Question and answer: Graded oral comprehension exercises (New ed. / revised by Peter Ferguson.). Longman.

Chicago Style (17th ed.) Citation

Alexander, L. G., and Peter Ferguson. Question and Answer: Graded Oral Comprehension Exercises. New ed. / revised by Peter Ferguson. London: Longman, 1977.

MLA (9th ed.) Citation

Alexander, L. G., and Peter Ferguson. Question and Answer: Graded Oral Comprehension Exercises. New ed. / revised by Peter Ferguson. Longman, 1977.