APA (7th ed.) Citation

Maidment St. Stella & Roberts L. Lorena. (2010). Happy Street 1: Activity Book. New York, Oxford University Press, 2010.

Chicago Style (17th ed.) Citation

Maidment St. Stella and Roberts L. Lorena. Happy Street 1: Activity Book. New York, Oxford University Press, 2010, 2010.

MLA (9th ed.) Citation

Maidment St. Stella and Roberts L. Lorena. Happy Street 1: Activity Book. New York, Oxford University Press, 2010, 2010.