Jakeman, V. (2004). Step up to IELTS. Cambridge University Press.
Chicagoスタイル(17版)引用形式Jakeman, Vanessa. Step Up to IELTS. Cambridge: Cambridge University Press, 2004.
MLA(8版)引用形式Jakeman, Vanessa. Step Up to IELTS. Cambridge University Press, 2004.
警告: この引用は必ずしも正確ではありません.