المؤلفون: Knox, Robert C., Sabatini, David A., Sack, Ronald L., Haskins, Robert D., Roach, Larry W., Fairbairn, Scott W.

المصدر: Journal of Engineering Education ; volume 84, issue 1, page 5-11 ; ISSN 1069-4730 2168-9830

الاتاحة: http://dx.doi.org/10.1002/j.2168-9830.1995.tb00139.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.2168-9830.1995.tb00139.x
https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.2168-9830.1995.tb00139.x