ebrary, Inc, Butler, R., & Russell, R. A. (2010). Giants of tourism. CABI.
芝加哥风格引文ebrary, Inc, Richard Butler, 与 Roslyn A. Russell. Giants of Tourism. Wallingford, Oxfordshire ; Cambridge, MA: CABI, 2010.
MLA引文ebrary, Inc, et al. Giants of Tourism. CABI, 2010.
警告：这些引文格式不一定是100％准确.