Mortimer, C. (1977). Weak forms: A pronunciation practice book. Cambridge University.
Chicagoスタイル(17版)引用形式Mortimer, Colin. Weak Forms: A Pronunciation Practice Book. Cambridge: Cambridge University, 1977.
MLA(9版)引用形式Mortimer, Colin. Weak Forms: A Pronunciation Practice Book. Cambridge University, 1977.
警告: この引用は必ずしも正確ではありません.