Dyfyniad APA
Betty, G. (2009). Sound and healthy environment in hotels. Global Media.
Dyfyniad Arddull Chicago
Betty, Gilbert. Sound and Healthy Environment in Hotels. Chandni Chowk, Delhi: Global Media, 2009.
Dyfyniad MLA
Betty, Gilbert. Sound and Healthy Environment in Hotels. Global Media, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.