Jakeman, V. (2004). Step up to IELTS. Cambridge University Press.
芝加哥风格引文Jakeman, Vanessa. Step Up to IELTS. Cambridge: Cambridge University Press, 2004.
MLA引文Jakeman, Vanessa. Step Up to IELTS. Cambridge University Press, 2004.
警告：这些引文格式不一定是100％准确.