Dyfyniad APA

McDonald,P C. (1992). Directory of low temperature research and development in europe (7th.). IOP.

Dyfyniad Arddull Chicago

McDonald,P C. Directory of Low Temperature Research and Development in Europe. 7th. Bristol and Philadelphia: IOP, 1992.

Dyfyniad MLA

McDonald,P C. Directory of Low Temperature Research and Development in Europe. 7th. IOP, 1992.

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