Allen, E. D. (1977). Classroom techniques: Foreign languages and English as a second language. New York: Harcourt Brace Jovanovich.
শিকাগো স্টাইলে সাইটেশনAllen, Edward David. Classroom Techniques: Foreign Languages and English As a Second Language. New York: Harcourt Brace Jovanovich, 1977.
এমএলএ সাইটেশনAllen, Edward David. Classroom Techniques: Foreign Languages and English As a Second Language. New York: Harcourt Brace Jovanovich, 1977.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.