ebrary, Inc, Hehmeyer, I., Regourd, A., & Schönig, H. (2012). Herbal medicine in Yemen: Traditional knowledge and practice, and their value for today's world. Brill.
Čikaški stil citiranja (17. izdanje)ebrary, Inc, Ingrid Hehmeyer, Anne Regourd, i Hannelore Schönig. Herbal Medicine in Yemen: Traditional Knowledge and Practice, and Their Value for Today's World. Leiden ; Boston: Brill, 2012.
MLA način citiranja (9. izdanje)ebrary, Inc, et al. Herbal Medicine in Yemen: Traditional Knowledge and Practice, and Their Value for Today's World. Brill, 2012.
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