HARTMAN, H. M. (1960). Learn biology: The easy way. Greystone Press.
芝加哥风格引文HARTMAN, Harold M. Learn Biology: The Easy Way. Cambridge: Greystone Press, 1960.
MLA引文HARTMAN, Harold M. Learn Biology: The Easy Way. Greystone Press, 1960.
警告：这些引文格式不一定是100％准确.