Dyfyniad APA
Denham, C., & Lieberman, A. (1980). Time to learn. U.S. Department of education.
Dyfyniad Arddull Chicago
Denham, Carolyn, and Ann Lieberman. Time to Learn. California: U.S. Department of education, 1980.
Dyfyniad MLA
Denham, Carolyn, and Ann Lieberman. Time to Learn. U.S. Department of education, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.