Giles, J. T., Palat, C. T., Chien, S. H., Chang, Z. G., & Kennedy, D. T. (2000). Evaluation of Echinacea for Treatment of the Common Cold. Pharmacotherapy.
Čikaški stil citiranjaGiles, Joel T., Cuthbert T. Palat, Susan H. Chien, Ziba Gorji Chang, i Daniel T. Kennedy. "Evaluation of Echinacea for Treatment of the Common Cold." Pharmacotherapy 2000.
MLA način citiranjaGiles, Joel T., et al. "Evaluation of Echinacea for Treatment of the Common Cold." Pharmacotherapy 2000.
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