APA (7th ed.) Citation

Ogundipe, P. A., & Tregidgo, P. S. (1965). Practical English: A comprehensive secondary course. Longmans.

Chicago Style (17th ed.) Citation

Ogundipe, P. A., and P. S. Tregidgo. Practical English: A Comprehensive Secondary Course. London: Longmans, 1965.

MLA (9th ed.) Citation

Ogundipe, P. A., and P. S. Tregidgo. Practical English: A Comprehensive Secondary Course. Longmans, 1965.