Roberts, R., Gakonga, J., & Preshous, A. (2004). IELTS foundation: Student's book. Macmillan Education.
Chicagoスタイル(17版)引用形式Roberts, Rachael, Joanne Gakonga, , Andrew Preshous. IELTS Foundation: Student's Book. Oxford: Macmillan Education, 2004.
MLA(8版)引用形式Roberts, Rachael, et al. IELTS Foundation: Student's Book. Macmillan Education, 2004.
警告: この引用は必ずしも正確ではありません.