Betty, G. (2009). Sound and healthy environment in hotels. Global Media.
芝加哥风格引文Betty, Gilbert. Sound and Healthy Environment in Hotels. Chandni Chowk, Delhi: Global Media, 2009.
MLA引文Betty, Gilbert. Sound and Healthy Environment in Hotels. Global Media, 2009.
警告：这些引文格式不一定是100％准确.