Daniele Bourdais; Malcolm Hope; Teresa Huntley; Clive Thorpe. (1997). Essor: Student's Book. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDaniele Bourdais; Malcolm Hope; Teresa Huntley; Clive Thorpe. Essor: Student's Book. Oxford University Press, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDaniele Bourdais; Malcolm Hope; Teresa Huntley; Clive Thorpe. Essor: Student's Book. Oxford University Press, 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.