Easley, J. A. J., Gelder, H. M., & Golden, W. M. (1966). A plato program for instruction and data collection in mathematical problem solving (Reprint.). University of Illinois.
Citazione stile Chigago Style (17a edizione)Easley, J. A. Jr, H. M. Gelder, e W. M. Golden. A Plato Program for Instruction and Data Collection in Mathematical Problem Solving. Reprint. Urbana, Ill: University of Illinois, 1966.
Citatione MLA (9a ed.)Easley, J. A. Jr, et al. A Plato Program for Instruction and Data Collection in Mathematical Problem Solving. Reprint. University of Illinois, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.