Roberts L. Lorena. (2009). Happy Street 1: Teacher's Book. New York, Oxford University Press, 2009.
Chicago Style (17th ed.) CitationRoberts L. Lorena. Happy Street 1: Teacher's Book. New York, Oxford University Press, 2009, 2009.
MLA (9th ed.) CitationRoberts L. Lorena. Happy Street 1: Teacher's Book. New York, Oxford University Press, 2009, 2009.
Warning: These citations may not always be 100% accurate.