APA
Chakravarty S. R., . (1977). Audio-visual aids in education. New Delhi: Sagar Publications.
Chicago
Chakravarty S R, . 1977. Audio-visual aids in education. New Delhi: Sagar Publications.
Harvard
Chakravarty S. R., . (1977). Audio-visual aids in education. New Delhi: Sagar Publications.
MLA
Chakravarty S R, . Audio-visual aids in education. New Delhi: Sagar Publications. 1977.