Jensen, J. R., & Jensen, R. R. (2013). Introductory geographic information systems. Pearson.
芝加哥风格引文Jensen, John R., 与 Ryan R. Jensen. Introductory Geographic Information Systems. Boston: Pearson, 2013.
MLA引文Jensen, John R., 与 Ryan R. Jensen. Introductory Geographic Information Systems. Pearson, 2013.
警告：这些引文格式不一定是100％准确.