Dyfyniad APA
Wrenn, C. G., & Schwarzrock, S. P. (1971). The Mind benders. American Guidance Service, Inc..
Dyfyniad Arddull Chicago
Wrenn, C. Gilbert, and Shirley Pratt Schwarzrock. The Mind Benders. [Circle Pines, Minn.: American Guidance Service, Inc., 1971.
Dyfyniad MLA
Wrenn, C. Gilbert, and Shirley Pratt Schwarzrock. The Mind Benders. American Guidance Service, Inc., 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.