Dyfyniad APA

WHO. (1993). Environmental health criteria; N.137: Electromagnetic fields ( 300 Hz to 300 GHz ). Geneva: WHO.

Dyfyniad Arddull Chicago

WHO. Environmental Health Criteria; N.137: Electromagnetic Fields ( 300 Hz to 300 GHz ). Geneva: WHO, 1993.

Dyfyniad MLA

WHO. Environmental Health Criteria; N.137: Electromagnetic Fields ( 300 Hz to 300 GHz ). Geneva: WHO, 1993.

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