Dyfyniad APA
Light, R. J., Singer, J. D., & Willett, J. B. (1990). By design: Planning research on higher education. Harvard University Press.
Dyfyniad Arddull Chicago
Light, Richard J., Judith D. Singer, and John B. Willett. By Design: Planning Research on Higher Education. Cambridge, MA: Harvard University Press, 1990.
Dyfyniad MLA
Light, Richard J., et al. By Design: Planning Research on Higher Education. Harvard University Press, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.