Barrett, R. (1984). Day to day English Book 2: English skills fo life, work & leisure. Longman Group Ltd.
Citazione stile Chigago Style (17a edizione)Barrett, Robert. Day to Day English Book 2: English Skills Fo Life, Work & Leisure. New York: Longman Group Ltd, 1984.
Citatione MLA (9a ed.)Barrett, Robert. Day to Day English Book 2: English Skills Fo Life, Work & Leisure. Longman Group Ltd, 1984.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.