Dyfyniad APA

Geoffrey Keppel. (1982). Design and analysis: A researcher's handbook. Englewood Cliffs, New Jersey: Prentice-Hall.

Dyfyniad Arddull Chicago

Geoffrey Keppel. Design and Analysis: A Researcher's Handbook. Englewood Cliffs, New Jersey: Prentice-Hall, 1982.

Dyfyniad MLA

Geoffrey Keppel. Design and Analysis: A Researcher's Handbook. Englewood Cliffs, New Jersey: Prentice-Hall, 1982.

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