Dyfyniad APA

Leedy Paul D. (2001). Practical Research Planning and Design. Merrill Prentice Hall.

Dyfyniad Arddull Chicago

Leedy Paul D. Practical Research Planning and Design. MPH: Merrill Prentice Hall, 2001.

Dyfyniad MLA

Leedy Paul D. Practical Research Planning and Design. Merrill Prentice Hall, 2001.

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