Klee, G. (1991). Conservation of natural resources. Prentice-Hall.
芝加哥风格引文Klee, Gary. Conservation of Natural Resources. Englewood Cliffs, N.J: Prentice-Hall, 1991.
MLA引文Klee, Gary. Conservation of Natural Resources. Prentice-Hall, 1991.
警告：这些引文格式不一定是100％准确.