Dyfyniad APA

Gage, N. L., & Berliner, D. C. (1998). Educational psychology (6th edition.). Houghton Mifflin.

Dyfyniad Arddull Chicago

Gage, N L., and David C. Berliner. Educational Psychology. 6th edition. Boston: Houghton Mifflin, 1998.

Dyfyniad MLA

Gage, N L., and David C. Berliner. Educational Psychology. 6th edition. Houghton Mifflin, 1998.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.