School Mathematics Study Group, Wilson, J. W., Cahen, L. S., & Begle, E. G. (1968). Non-test data. Leland Stanford Junior University.
Cita Chicago (17th ed.)School Mathematics Study Group, James W. Wilson, Leonard S. Cahen, i Edward G. Begle. Non-test Data. Stanford, CA: Leland Stanford Junior University, 1968.
Cita MLA (9th ed.)School Mathematics Study Group, et al. Non-test Data. Leland Stanford Junior University, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.