Dyfyniad APA
Layman, C. S. (2002). The power of logic (2nd ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Layman, C. Stephen. The Power of Logic. 2nd ed. Boston: McGraw-Hill, 2002.
Dyfyniad MLA
Layman, C. Stephen. The Power of Logic. 2nd ed. McGraw-Hill, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.