APA (7th ed.) Citation

Thirunavukkrasu,S. (2005). Primary Environmental Studies (First Edition.). International book house.

Chicago Style (17th ed.) Citation

Thirunavukkrasu,S. Primary Environmental Studies. First Edition. sri lanka: International book house, 2005.

MLA (9th ed.) Citation

Thirunavukkrasu,S. Primary Environmental Studies. First Edition. International book house, 2005.

Warning: These citations may not always be 100% accurate.