APA
State Council of Educational Research and Training, . (2018). Geography : (11th standard) higher secondary first year. Chennai: Tamil Nadu Textbook and Educational Services Corporation.
Chicago
State Council of Educational Research and Training, . 2018. Geography : (11th standard) higher secondary first year. Chennai: Tamil Nadu Textbook and Educational Services Corporation.
Harvard
State Council of Educational Research and Training, . (2018). Geography : (11th standard) higher secondary first year. Chennai: Tamil Nadu Textbook and Educational Services Corporation.
MLA
State Council of Educational Research and Training, . Geography : (11th standard) higher secondary first year. Chennai: Tamil Nadu Textbook and Educational Services Corporation. 2018.