Wood, M. M. (1985). Developmental mathematics (3rd ed.). PWS-Kent.
Cita Chicago (17th ed.)Wood, Martha M. Developmental Mathematics. 3rd ed. Boston, Mass: PWS-Kent, 1985.
Cita MLA (9th ed.)Wood, Martha M. Developmental Mathematics. 3rd ed. PWS-Kent, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.