APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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