APA (7 वां संस्करण) प्रशस्ति पत्र

Nunan, D., & Bailey, K. M. (2009). Exploring second language classroom research: A comprehensive guide. Heinle, Cengage Learning.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Nunan, David, और Kathleen M. Bailey. Exploring Second Language Classroom Research: A Comprehensive Guide. Boston, MA: Heinle, Cengage Learning, 2009.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Nunan, David, और Kathleen M. Bailey. Exploring Second Language Classroom Research: A Comprehensive Guide. Heinle, Cengage Learning, 2009.