WARD, J. M. (1972). Practice in structure and usage for Intermediate students. Longman.
Citazione stile Chigago Style (17a edizione)WARD, J. Millington. Practice in Structure and Usage for Intermediate Students. London: Longman, 1972.
Citatione MLA (9a ed.)WARD, J. Millington. Practice in Structure and Usage for Intermediate Students. Longman, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.