APA (7 वां संस्करण) प्रशस्ति पत्र

HARDWICK, H. (2003). WORDS ARE IMPORTANT- BOOK 4 (1st.). WHEELER PUBLISHING.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

HARDWICK, H.C. WORDS ARE IMPORTANT- BOOK 4. 1st. ALLAHABAD: WHEELER PUBLISHING, 2003.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

HARDWICK, H.C. WORDS ARE IMPORTANT- BOOK 4. 1st. WHEELER PUBLISHING, 2003.