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