APA
(1970). Preparation and evaluation of textbooks in mathematics: Principles and procedures. New Delhi, India: National Council of Educational Research and Training.
Chicago
1970. Preparation and evaluation of textbooks in mathematics: Principles and procedures. New Delhi, India: National Council of Educational Research and Training.
Harvard
(1970). Preparation and evaluation of textbooks in mathematics: Principles and procedures. New Delhi, India: National Council of Educational Research and Training.
MLA
Preparation and evaluation of textbooks in mathematics: Principles and procedures. New Delhi, India: National Council of Educational Research and Training. 1970.
