Shepard, P., & McKinley, D. (1971). Environmental essays on the planet as home. Houghton-Mifflin.
芝加哥风格引文Shepard, Paul, 与 Daniel McKinley. Environmental Essays on the Planet as Home. Boston: Houghton-Mifflin, 1971.
MLA引文Shepard, Paul, 与 Daniel McKinley. Environmental Essays on the Planet as Home. Houghton-Mifflin, 1971.
警告：这些引文格式不一定是100％准确.