Cita APA (7a ed.)

Sangster, M., & Catterall, R. (2009). Early Numeracy: Mathematical activities for 3 to 5 year olds. Bloomsbury Publishing.

Cita Chicago Style (17a ed.)

Sangster, Margaret, y Rona Catterall. Early Numeracy: Mathematical Activities for 3 to 5 Year Olds. London: Bloomsbury Publishing, 2009.

Cita MLA (8a ed.)

Sangster, Margaret, y Rona Catterall. Early Numeracy: Mathematical Activities for 3 to 5 Year Olds. Bloomsbury Publishing, 2009.