Constantine, G. H., & Tyler, V. E. (2000). Tyler's tips: The shopper's guide for herbal remedies. Haworth.
Citazione stile Chigago Style (17a edizione)Constantine, George H., e Varro E. Tyler. Tyler's Tips: The Shopper's Guide for Herbal Remedies. New York ; London: Haworth, 2000.
Citatione MLA (8a ed.)Constantine, George H., e Varro E. Tyler. Tyler's Tips: The Shopper's Guide for Herbal Remedies. Haworth, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.