Soars, L., Soars, J., & Hancock, P. (2019). Headway: Pre-Intermediate - Student's Book. Oxford University Press.
Chicagoスタイル(17版)引用形式Soars, Liz, John Soars, , Paul Hancock. Headway: Pre-Intermediate - Student's Book. Oxford, Unites Kingdom: Oxford University Press, 2019.
MLA(9版)引用形式Soars, Liz, et al. Headway: Pre-Intermediate - Student's Book. Oxford University Press, 2019.
警告: この引用は必ずしも正確ではありません.