APA (7th ed.) Citation

Giggins, L. W., & Shoebridge, D. J. (1970). Tense drills. Longman.

Chicago Style (17th ed.) Citation

Giggins, L. W., and D. J. Shoebridge. Tense Drills. Londres: Longman, 1970.

MLA (9th ed.) Citation

Giggins, L. W., and D. J. Shoebridge. Tense Drills. Longman, 1970.