Dyfyniad APA

GWYNNE PETER/ JEFFRIES, B. (1998). ILLUSTRATED ENCY OF ENERGY&PHYSICS. TIME LIFE PUBLICATIONS.

Dyfyniad Arddull Chicago

GWYNNE PETER/ JEFFRIES, BRIAN. ILLUSTRATED ENCY OF ENERGY&PHYSICS. ASIA: TIME LIFE PUBLICATIONS, 1998.

Dyfyniad MLA

GWYNNE PETER/ JEFFRIES, BRIAN. ILLUSTRATED ENCY OF ENERGY&PHYSICS. TIME LIFE PUBLICATIONS, 1998.

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