Lewis, N. (1973). Thirty days to better English. Dolphin Books.
Citación estilo ChicagoLewis, Norman. Thirty Days to Better English. Garden City, N.Y.: Dolphin Books, 1973.
Cita MLALewis, Norman. Thirty Days to Better English. Dolphin Books, 1973.
Warning: These citations may not always be 100% accurate.