Kuan, L. G. (1986). Herbal medicine and drug substitution: Perceptions and attitudes of PGH health workers. University of the Philippines Manila.
Citazione stile Chigago Style (17a edizione)Kuan, Letty G. Herbal Medicine and Drug Substitution: Perceptions and Attitudes of PGH Health Workers. Manila: University of the Philippines Manila, 1986.
Citatione MLA (9a ed.)Kuan, Letty G. Herbal Medicine and Drug Substitution: Perceptions and Attitudes of PGH Health Workers. University of the Philippines Manila, 1986.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.