Colwell, R. (1970). Introduction to backpacking. Stackpole Books.
芝加哥风格引文Colwell, Robert. Introduction to Backpacking. [Harrisburg, Pa.]: Stackpole Books, 1970.
MLA引文Colwell, Robert. Introduction to Backpacking. Stackpole Books, 1970.
警告：这些引文格式不一定是100％准确.