Hsu, J. (1989). Guide to commercial telecommunications services. Prentice Hall.
芝加哥风格引文Hsu, Jeffrey. Guide to Commercial Telecommunications Services. Englewood Cliffs, N.J: Prentice Hall, 1989.
MLA引文Hsu, Jeffrey. Guide to Commercial Telecommunications Services. Prentice Hall, 1989.
警告：这些引文格式不一定是100％准确.