Hatfield, M. M., Bitter, G. G., & Edwards, N. T. (1993). Mathematics methods for the elementary and middle school (2nd ed.). Allyn and Bacon.
Citazione stile Chigago Style (17a edizione)Hatfield, Mary M., Gary G. Bitter, e Nancy Tanner Edwards. Mathematics Methods for the Elementary and Middle School. 2nd ed. Boston: Allyn and Bacon, 1993.
Citatione MLA (9a ed.)Hatfield, Mary M., et al. Mathematics Methods for the Elementary and Middle School. 2nd ed. Allyn and Bacon, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.