Gaya APA

Allen, D, E., Hatfield, G. (2004). E-BOOK Medicinal Plants in Folk Tradition : An Ethnobotany Of Britain & Ireland . U.S.A: Timber Press, Inc..

Gaya MLA

Allen, David, E.., Hatfield, Gabrielle. "E-BOOK Medicinal Plants in Folk Tradition : An Ethnobotany Of Britain & Ireland". U.S.A: Timber Press, Inc., 2004. Text.