Soars, L., & Soars, J. (2011). New headway elementary student's book (4th ed.). Oxford University Press.
Chicagoスタイル(17版)引用形式Soars, Liz, , John Soars. New Headway Elementary Student's Book. 4th ed. Oxford: Oxford University Press, 2011.
MLA(9版)引用形式Soars, Liz, , John Soars. New Headway Elementary Student's Book. 4th ed. Oxford University Press, 2011.
警告: この引用は必ずしも正確ではありません.