Spellman, F. R. (2009). Geography for nongeographers. Government Institutes.
芝加哥风格引文Spellman, Frank R. Geography for Nongeographers. Lanham: Government Institutes, 2009.
MLA引文Spellman, Frank R. Geography for Nongeographers. Government Institutes, 2009.
警告：这些引文格式不一定是100％准确.