Morgan, J. (1988). The Q book: Practising interrogatives in reading, speaking and writing. Longman.
Citazione stile Chigago Style (17a edizione)Morgan, John. The Q Book: Practising Interrogatives in Reading, Speaking and Writing. Essex: Longman, 1988.
Citatione MLA (9a ed.)Morgan, John. The Q Book: Practising Interrogatives in Reading, Speaking and Writing. Longman, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.