APA
(2009). Environmental studies- science (Kannada ) : III standard. Chennai: Tamilnadu Text book Corporation.
Chicago
2009. Environmental studies- science (Kannada ) : III standard. Chennai: Tamilnadu Text book Corporation.
Harvard
(2009). Environmental studies- science (Kannada ) : III standard. Chennai: Tamilnadu Text book Corporation.
MLA
Environmental studies- science (Kannada ) : III standard. Chennai: Tamilnadu Text book Corporation. 2009.