Naunton, J., & Tulip, M. (2004). ProFile 1 student's book: Pre-intermediate. Oxford University Press.
芝加哥风格引文Naunton, Jon, 与 Mark Tulip. ProFile 1 Student's Book: Pre-intermediate. Oxford: Oxford University Press, 2004.
MLA引文Naunton, Jon, 与 Mark Tulip. ProFile 1 Student's Book: Pre-intermediate. Oxford University Press, 2004.
警告：这些引文格式不一定是100％准确.