APA
(1979). Syllabi and courses for All India secondary school examination 1981. New Delhi, India: Central Board of Secondary Education.
Chicago
1979. Syllabi and courses for All India secondary school examination 1981. New Delhi, India: Central Board of Secondary Education.
Harvard
(1979). Syllabi and courses for All India secondary school examination 1981. New Delhi, India: Central Board of Secondary Education.
MLA
Syllabi and courses for All India secondary school examination 1981. New Delhi, India: Central Board of Secondary Education. 1979.
