Walker, S. (2009). Travel resources: An annotated guide. Scarecrow Press.
芝加哥风格引文Walker, Stephen. Travel Resources: An Annotated Guide. Lanham, Md.: Scarecrow Press, 2009.
MLA引文Walker, Stephen. Travel Resources: An Annotated Guide. Scarecrow Press, 2009.
警告：这些引文格式不一定是100％准确.