Asphaug, V., & Sorensen, E. (2010). Global positioning systems. Nova Science Publishers.
芝加哥风格引文Asphaug, Viggo, 与 Elias Sorensen. Global Positioning Systems. New York: Nova Science Publishers, 2010.
MLA引文Asphaug, Viggo, 与 Elias Sorensen. Global Positioning Systems. Nova Science Publishers, 2010.
警告：这些引文格式不一定是100％准确.