Gaya APA

Lichtenberg, A, P, T, ;, B, K. (1982). Mathematics: a good beginning strategies for teaching children (ed. 2). California: brooks /cole publishing company.

Gaya MLA

Lichtenberg, Andria, P., Troutman, ;, Betty, K.. "Mathematics: a good beginning strategies for teaching children". ed. 2 California: brooks /cole publishing company, 1982. Text.