Cofnodi Dyfyniadau
Dyfyniad APA
Leedy, P. D. (1989). Practical research: Planning and design (4th ed.). Macmillan ; Collier Macmillan.
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Dyfyniad Arddull Chicago
Leedy, Paul D. Practical Research: Planning and Design. 4th ed. New York : London: Macmillan ; Collier Macmillan, 1989.
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Dyfyniad MLA
Leedy, Paul D. Practical Research: Planning and Design. 4th ed. Macmillan ; Collier Macmillan, 1989.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.