Dyfyniad APA

Freier .G.D. (1988). Demonstration handbook for Physics. American Association of Physics Techers.

Dyfyniad Arddull Chicago

Freier .G.D. Demonstration Handbook for Physics. College Park: American Association of Physics Techers, 1988.

Dyfyniad MLA

Freier .G.D. Demonstration Handbook for Physics. American Association of Physics Techers, 1988.

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