APA
(1977). Biology: A textbook for higher secondary schools, Classes 11th-12th. 2 Part. New Delhi, India: National Council of Educational Research and Training.
Chicago
1977. Biology: A textbook for higher secondary schools, Classes 11th-12th. 2 Part. New Delhi, India: National Council of Educational Research and Training.
Harvard
(1977). Biology: A textbook for higher secondary schools, Classes 11th-12th. 2 Part. New Delhi, India: National Council of Educational Research and Training.
MLA
Biology: A textbook for higher secondary schools, Classes 11th-12th. 2 Part. New Delhi, India: National Council of Educational Research and Training. 1977.
