APA (7th ed.) Citation

Dallas, D., & Iggulden, . M. (1990). Let's learn English. Longman.

Chicago Style (17th ed.) Citation

Dallas, Donald, and Margaret Iggulden. Let's Learn English. Harlow: Longman, 1990.

MLA (8th ed.) Citation

Dallas, Donald, and Margaret Iggulden. Let's Learn English. Longman, 1990.