Naunton, J., & Tulip, M. (2004). ProFile 1 student's book: Pre-intermediate. Oxford University Press.
Chicago Style (17. basım) AtıfNaunton, Jon, ve Mark Tulip. ProFile 1 Student's Book: Pre-intermediate. Oxford: Oxford University Press, 2004.
MLA (8th ed.) AtıfNaunton, Jon, ve Mark Tulip. ProFile 1 Student's Book: Pre-intermediate. Oxford University Press, 2004.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..