Cita APA (7th ed.)

Collars, C., Lee, K. P., Hoe, L. N., & Seng, T. C. (2003). Shaping maths: Activity book. Federal Publications.

Cita Chicago (17th ed.)

Collars, Charlotte, Koay Phong Lee, Lee Ngan Hoe, i Tan Cheow Seng. Shaping Maths: Activity Book. Singapore: Federal Publications, 2003.

Cita MLA (8th ed.)

Collars, Charlotte, et al. Shaping Maths: Activity Book. Federal Publications, 2003.