Harold B. Allen. (1965). Teaching English as a second language. New York: McGraw-Hill.
Chicago ZitierstilHarold B. Allen. Teaching English As a Second Language. New York: McGraw-Hill, 1965.
MLA ZitierstilHarold B. Allen. Teaching English As a Second Language. New York: McGraw-Hill, 1965.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.