Dyfyniad APA

Langley, B. C. (1978). Refrigeration and air conditioning. Reston publishing.

Dyfyniad Arddull Chicago

Langley, Billy C. Refrigeration and Air Conditioning. Reston: Reston publishing, 1978.

Dyfyniad MLA

Langley, Billy C. Refrigeration and Air Conditioning. Reston publishing, 1978.

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