Citação norma APA
Abbs, B., & Freebairn, I. (1990). Opening Strategies. Strategies 1. An Integrated Language Course for Beginners of English. Students' Book (23rd impression.). Longman Group UK.
Citação norma Chicago
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.
Citação norma MLA
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.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.