APA
(1972). Preparation and evaluation of textbooks in geography: Principles and procedures. New Delhi, India: National Council of Educational Research and Training.
Chicago
1972. Preparation and evaluation of textbooks in geography: Principles and procedures. New Delhi, India: National Council of Educational Research and Training.
Harvard
(1972). Preparation and evaluation of textbooks in geography: Principles and procedures. New Delhi, India: National Council of Educational Research and Training.
MLA
Preparation and evaluation of textbooks in geography: Principles and procedures. New Delhi, India: National Council of Educational Research and Training. 1972.
