Ronald, A. (2003). Reader of the purple sage: Essays on Western writers and environmental literature. University of Nevada Press.
芝加哥风格引文Ronald, Ann. Reader of the Purple Sage: Essays on Western Writers and Environmental Literature. Reno: University of Nevada Press, 2003.
MLA引文Ronald, Ann. Reader of the Purple Sage: Essays on Western Writers and Environmental Literature. University of Nevada Press, 2003.
警告：这些引文格式不一定是100％准确.