APA Style

Priya, S, V. (1999). 'O' LEVEL TEXT- BOOK Module - 4 (1 th ed 1999). New Delhi: Shri R.K Mehta.

MLA Style

Priya, Singh, Vishnu. "'O' LEVEL TEXT- BOOK Module - 4". 1 th ed 1999 New Delhi: Shri R.K Mehta, 1999. Text.