Roberts, L., & Lorena Roberts. (2001). Happy Street: Teacher's book. Oxford,New York: Oxford University Press.
Chicago Style citaatRoberts, Lorena, en Lorena Roberts. Happy Street: Teacher's Book. Oxford,New York: Oxford University Press, 2001.
MLA citatieRoberts, Lorena, en Lorena Roberts. Happy Street: Teacher's Book. Oxford,New York: Oxford University Press, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.