Cita APA (7th ed.)

Maidment S. Stella & Roberts L. Lorena. (2009). Happy Street 2: Posters. Oxford, Oxford University Press, 2009.

Cita Chicago (17th ed.)

Maidment S. Stella i Roberts L. Lorena. Happy Street 2: Posters. Oxford, Oxford University Press, 2009, 2009.

Cita MLA (9th ed.)

Maidment S. Stella i Roberts L. Lorena. Happy Street 2: Posters. Oxford, Oxford University Press, 2009, 2009.