APA
NULL, . (2015). Biology Textbook For Class XII. NewDelhi: NCERT.
Chicago
NULL, . 2015. Biology Textbook For Class XII. NewDelhi: NCERT.
Harvard
NULL, . (2015). Biology Textbook For Class XII. NewDelhi: NCERT.
MLA
NULL, . Biology Textbook For Class XII. NewDelhi: NCERT. 2015.