APA (7e ed.) Bronvermelding

Geist, E. (2009). Children are born mathematicians: Supporting mathematical development, birth to age 8. Merrill/Pearson.

Chicago (17e ed.) Bronvermelding

Geist, Eugene. Children Are Born Mathematicians: Supporting Mathematical Development, Birth to Age 8. Upper Saddle River, N.J: Merrill/Pearson, 2009.

MLA (9e ed.) Bronvermelding

Geist, Eugene. Children Are Born Mathematicians: Supporting Mathematical Development, Birth to Age 8. Merrill/Pearson, 2009.