Kuan, L. G. (1986). Herbal medicine and drug substitution: Perceptions and attitudes of PGH health workers. University of the Philippines.
Citace podle Chicago (17th ed.)Kuan, Letty G. Herbal Medicine and Drug Substitution: Perceptions and Attitudes of PGH Health Workers. Manila: University of the Philippines, 1986.
Citace podle MLA (9th ed.)Kuan, Letty G. Herbal Medicine and Drug Substitution: Perceptions and Attitudes of PGH Health Workers. University of the Philippines, 1986.
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