O'Neill, R., & Richard O'Neill. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.
シカゴスタイル引用形O'Neill, Richard, , Richard O'Neill. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
MLA引用形式O'Neill, Richard, , Richard O'Neill. 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.