Lansford, L., & Lewis Lansford. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.
シカゴスタイル引用形Lansford, Lewis, , Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
MLA引用形式Lansford, Lewis, , Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
警告: この引用は必ずしも正確ではありません.