Allen, H. B. (1972). Teaching English as a Second Languages. Mcgraw -Hill INC.
Trích dẫn kiểu ChicagoAllen, Harold B. Teaching English As a Second Languages. Mcgraw -Hill INC, 1972.
MLA引文Allen, Harold B. Teaching English As a Second Languages. Mcgraw -Hill INC, 1972.
警告:這些引文格式不一定是100%准確.