Johnston, C. (1987). Developmental mathematics (2nd ed.). Wadsworth.
Citación estilo ChicagoJohnston, C.L. Developmental Mathematics. 2nd ed. Belmont, Calif: Wadsworth, 1987.
Cita MLAJohnston, C.L. Developmental Mathematics. 2nd ed. Wadsworth, 1987.
Warning: These citations may not always be 100% accurate.