Roberts, L., & Lorena Roberts. (2001). Happy House: Teacher's Book. Oxford: Oxford University Press.
シカゴスタイル引用形Roberts, Lorena, , Lorena Roberts. Happy House: Teacher's Book. Oxford: Oxford University Press, 2001.
MLA引用形式Roberts, Lorena, , Lorena Roberts. Happy House: Teacher's Book. Oxford: Oxford University Press, 2001.
警告: この引用は必ずしも正確ではありません.