Kosta, J., & Williams, M. (2015). Prepare: : Student's book (2nd edition.). [Cambridge]: Cambridge University Press.
शिकागो स्टाइल उद्धरणKosta, Joanna, और Melanie Williams. Prepare: : Student's Book. 2nd edition. [Cambridge]: Cambridge University Press, 2015.
एमएलए उद्धरणKosta, Joanna, और Melanie Williams. Prepare: : Student's Book. 2nd edition. [Cambridge]: Cambridge University Press, 2015.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.