Oï Dell, F., & Broadhead, A. (2008). Objective advanced: Student's book with answers (2a. ed.). Cambridge University Press.
Chicagoスタイル(17版)引用形式Oï Dell, Felicity, , Annie Broadhead. Objective Advanced: Student's Book with Answers. 2a. ed. Cambridge: Cambridge University Press, 2008.
MLA(9版)引用形式Oï Dell, Felicity, , Annie Broadhead. Objective Advanced: Student's Book with Answers. 2a. ed. Cambridge University Press, 2008.
警告: この引用は必ずしも正確ではありません.