Dyfyniad APA

Oesterle, J. A. (1963). Logic: The art of defining and reasoning (2nd ed.). Prentice-Hall.

Dyfyniad Arddull Chicago

Oesterle, John A. Logic: The Art of Defining and Reasoning. 2nd ed. Englewood Cliffs, N.J: Prentice-Hall, 1963.

Dyfyniad MLA

Oesterle, John A. Logic: The Art of Defining and Reasoning. 2nd ed. Prentice-Hall, 1963.

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