APA (7 वां संस्करण) प्रशस्ति पत्र

Gupta , P. (2006). Income tax, central salex tax, service tax, VAT assessment year 2006-07 (3rd ed.). M.K.Gupta tax classes.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Gupta , Parul. Income Tax, Central Salex Tax, Service Tax, VAT Assessment Year 2006-07. 3rd ed. New Delhi: M.K.Gupta tax classes, 2006.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Gupta , Parul. Income Tax, Central Salex Tax, Service Tax, VAT Assessment Year 2006-07. 3rd ed. M.K.Gupta tax classes, 2006.