Citazione Stile APA (7a Edizione)
Abbs, B., & Freebairn, I. (1990). Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Students' Book (23rd impression.). Longman Group UK.
Citazione stile Chigago Style (17a edizione)
Abbs, Brian, e Ingrid Freebairn. Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Students' Book. 23rd impression. Harlow: Longman Group UK, 1990.
Citatione MLA (9a ed.)
Abbs, Brian, e Ingrid Freebairn. Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Students' Book. 23rd impression. Longman Group UK, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.