APA (7th ed.) Citation

Premaratne, S. P., & Ravinthirakumaran, N. (2013). Production theory. Kumaran Book House.

Chicago Style (17th ed.) Citation

Premaratne, S. P., and N. Ravinthirakumaran. Production Theory. Colombo: Kumaran Book House, 2013.

MLA (9th ed.) Citation

Premaratne, S. P., and N. Ravinthirakumaran. Production Theory. Kumaran Book House, 2013.

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