APA
Allen H. B., Campbell R. N. j. a., . (1972). Teaching English as a second language. New Delhi: Tata McGraw.
Chicago
Allen Harold B, Campbell Russell N jt author, . 1972. Teaching English as a second language. New Delhi: Tata McGraw.
Harvard
Allen H. B., Campbell R. N. j. a., . (1972). Teaching English as a second language. New Delhi: Tata McGraw.
MLA
Allen Harold B, Campbell Russell N jt author, . Teaching English as a second language. New Delhi: Tata McGraw. 1972.