APA Style

Co, L, L. (1989). Common medicinal plants of the Cordillera region: Norhtern Luzon, Philippines (Rev. and Expanded ed.). : CHESTCORE.

MLA Style

Co, LEONARDO, L.. "Common medicinal plants of the Cordillera region: Norhtern Luzon, Philippines". Rev. and Expanded ed. : CHESTCORE, 1989. Electronic resources.