Dyfyniad APA

(2011). Guidelines on HIV and AIDS for the postal sector. International Labour Office.

Dyfyniad Arddull Chicago

Guidelines on HIV and AIDS for the Postal Sector. Geneva: International Labour Office, 2011.

Dyfyniad MLA

Guidelines on HIV and AIDS for the Postal Sector. International Labour Office, 2011.

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