Scagel, R. (1984). Plants, an evolutionary survey. Wadsworth Pub. Co..
Tohutoru Kātū Chicago (17th ed.)Scagel, R.F. Plants, an Evolutionary Survey. Belmont, Calif.: Wadsworth Pub. Co., 1984.
Tohutoro MLA (9th ed.)Scagel, R.F. Plants, an Evolutionary Survey. Wadsworth Pub. Co., 1984.
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