Dyfyniad APA

Cortina, J., Elder, J., & Gonnet, K. (1995). Opening doors: Understanding college reading. McGraw-Hill.

Dyfyniad Arddull Chicago

Cortina, Joe, Janet Elder, and Katherine Gonnet. Opening Doors: Understanding College Reading. New York: McGraw-Hill, 1995.

Dyfyniad MLA

Cortina, Joe, et al. Opening Doors: Understanding College Reading. McGraw-Hill, 1995.

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