Long, R. W., & Norstog, K. (1976). Plant biology: A laboratory manual for elementary botany. Philadelphia: W.B.Saunders Company.
Παραπομπή Chicago StyleLong, Robert W., and Knut Norstog. Plant Biology: A Laboratory Manual for Elementary Botany. Philadelphia: W.B.Saunders Company, 1976.
Παραπομπή MLALong, Robert W., and Knut Norstog. Plant Biology: A Laboratory Manual for Elementary Botany. Philadelphia: W.B.Saunders Company, 1976.
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