Leavitt, R. G. (1901). Outlines of botany for the high school laboratory and classroom: (based on Gray's Lessons in botany). American book co.
Chicago-referens (17:e uppl.)Leavitt, Robert Greenleaf. Outlines of Botany for the High School Laboratory and Classroom: (based on Gray's Lessons in Botany). New York ; Cincinnati [etc.]: American book co, 1901.
MLA-referens (8:e uppl.)Leavitt, Robert Greenleaf. Outlines of Botany for the High School Laboratory and Classroom: (based on Gray's Lessons in Botany). American book co, 1901.
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