Gaya APA

Troutman, A, P., K., L. (1991). Mathematics a good beginning : Strategies for teaching children (Ed.4). California: Books/Cole Publishing Company.

Gaya MLA

Troutman, Andria, P., K., Lichtenberg,Betty. "Mathematics a good beginning : Strategies for teaching children". Ed.4 California: Books/Cole Publishing Company, 1991. Buku Tercetak.