Style de citation APA (7e éd.)
(1997). Longman essential activator: Put your ideas into words. Addison Wesley Longman Ltd.
Style de citation Chicago (17e éd.)
Longman Essential Activator: Put Your Ideas into Words. Essex: Addison Wesley Longman Ltd, 1997.
Style de citation MLA (9e éd.)
Longman Essential Activator: Put Your Ideas into Words. Addison Wesley Longman Ltd, 1997.
Attention : ces citations peuvent ne pas être correctes à 100%.