APA (7 वां संस्करण) प्रशस्ति पत्र

GUPTA S S. (2006). SERVICE TAX: HOW TO MEET YOUR OBLIGATIONS (20TH.). TAXMANN.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

GUPTA S S. SERVICE TAX: HOW TO MEET YOUR OBLIGATIONS. 20TH. NEW DELHI: TAXMANN, 2006.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

GUPTA S S. SERVICE TAX: HOW TO MEET YOUR OBLIGATIONS. 20TH. TAXMANN, 2006.