APA
National Council of Educational Research and Training, . (1964). Biology: a textbook for higher secondary schools: section 1 some basic facts about life. New Delhi: NCERT.
Chicago
National Council of Educational Research and Training, . 1964. Biology: a textbook for higher secondary schools: section 1 some basic facts about life. New Delhi: NCERT.
Harvard
National Council of Educational Research and Training, . (1964). Biology: a textbook for higher secondary schools: section 1 some basic facts about life. New Delhi: NCERT.
MLA
National Council of Educational Research and Training, . Biology: a textbook for higher secondary schools: section 1 some basic facts about life. New Delhi: NCERT. 1964.
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