Dyfyniad APA

Certo, S. C. (2006). Supervision: Concepts and skill-building (quinta edición.). McGraw-Hill Irwin.

Dyfyniad Arddull Chicago

Certo, Ssamuel C. Supervision: Concepts and Skill-building. quinta edición. Boston, Massachusetts: McGraw-Hill Irwin, 2006.

Dyfyniad MLA

Certo, Ssamuel C. Supervision: Concepts and Skill-building. quinta edición. McGraw-Hill Irwin, 2006.

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