ALLEN, W. S. (1974). Living english structure: Key to the exercises. Longman.
Citación estilo ChicagoALLEN, W. Stannard. Living English Structure: Key to the Exercises. London: Longman, 1974.
Cita MLAALLEN, W. Stannard. Living English Structure: Key to the Exercises. Longman, 1974.
Warning: These citations may not always be 100% accurate.