APA aipamena

Caldwell, J. H., Karp, K. S., Bay Williams, J. M., Rathmell, E., & Zbiek, R. M. Developing essential understanding of addition and subtraction for teaching mathematics in prekindergarten-grade 2.

Chicago Style aipamena

Caldwell, Janet H., Karen S. Karp, Jannifer M. Bay Williams, Ed Rathmell, and Rose Mary Zbiek. Developing Essential Understanding of Addition and Subtraction for Teaching Mathematics in Prekindergarten-grade 2.

MLA aipamena

Caldwell, Janet H., et al. Developing Essential Understanding of Addition and Subtraction for Teaching Mathematics in Prekindergarten-grade 2.