APA
NCERT-HUMAN ECOLOGY & FAMILY SCIENCE P1-12TH-12136. New Delhi: NCERT.
Chicago
NCERT-HUMAN ECOLOGY & FAMILY SCIENCE P1-12TH-12136. New Delhi: NCERT.
Harvard
NCERT-HUMAN ECOLOGY & FAMILY SCIENCE P1-12TH-12136. New Delhi: NCERT.
MLA
New Delhi: NCERT. .