APA
NCERT-HUMAN ECOLOGY & FAMILY SCIENCE P2-12TH-12137. New Delhi: NCERT.
Chicago
NCERT-HUMAN ECOLOGY & FAMILY SCIENCE P2-12TH-12137. New Delhi: NCERT.
Harvard
NCERT-HUMAN ECOLOGY & FAMILY SCIENCE P2-12TH-12137. New Delhi: NCERT.
MLA
New Delhi: NCERT. .