APA (7th ed.) Citation
Abbs, B., & Freebairn, I. (1990). Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Students' Book (23rd impression.). Longman Group UK.
Chicago Style (17th ed.) Citation
Abbs, Brian, and Ingrid Freebairn. Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Students' Book. 23rd impression. Harlow: Longman Group UK, 1990.
MLA (9th ed.) Citation
Abbs, Brian, and Ingrid Freebairn. Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Students' Book. 23rd impression. Longman Group UK, 1990.
Warning: These citations may not always be 100% accurate.