Dyfyniad APA

AARON, B., & AARON, A. (1991). Upgrading PCS made easy. Osborne McGraw-Hill.

Dyfyniad Arddull Chicago

AARON, Bud, and Alex AARON. Upgrading PCS Made Easy. Berkeley: Osborne McGraw-Hill, 1991.

Dyfyniad MLA

AARON, Bud, and Alex AARON. Upgrading PCS Made Easy. Osborne McGraw-Hill, 1991.

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