Abler, R. (1975). Human geography in a shrinking world. Duxbury Press.
芝加哥风格引文Abler, Ronald. Human Geography in a Shrinking World. North Scituate, Mass: Duxbury Press, 1975.
MLA引文Abler, Ronald. Human Geography in a Shrinking World. Duxbury Press, 1975.
警告：这些引文格式不一定是100％准确.