Krommenhoek, W., Sebus, J., & Van Esch, G. J. (1980). Biological structures. University Park Press.
Lua i Stíl Chicago (17ú heag.)Krommenhoek, W., J. Sebus, agus G. J. Van Esch. Biological Structures. Baltimore: University Park Press, 1980.
Lua MLA (9ú heag.)Krommenhoek, W., et al. Biological Structures. University Park Press, 1980.
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