Citazione Stile APA (7a Edizione)

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.

Citazione stile Chigago Style (17a edizione)

ebrary, Inc, Ingrid Hehmeyer, Anne Regourd, e Hannelore Schönig. Herbal Medicine in Yemen: Traditional Knowledge and Practice, and Their Value for Today's World. Leiden ; Boston: Brill, 2012.

Citatione MLA (9a ed.)

ebrary, Inc, et al. Herbal Medicine in Yemen: Traditional Knowledge and Practice, and Their Value for Today's World. Brill, 2012.