Citazione Stile APA (7a Edizione)

Co, L. L. (1989). Common medicinal plants of the Cordillera region, Northern Luzon, Philippines (Rev. and expanded ed.). Community Health Education, Services and Training in the Cordillera Region.

Citazione stile Chigago Style (17a edizione)

Co, Leonardo L. Common Medicinal Plants of the Cordillera Region, Northern Luzon, Philippines. Rev. and expanded ed. Baguio City: Community Health Education, Services and Training in the Cordillera Region, 1989.

Citatione MLA (9a ed.)

Co, Leonardo L. Common Medicinal Plants of the Cordillera Region, Northern Luzon, Philippines. Rev. and expanded ed. Community Health Education, Services and Training in the Cordillera Region, 1989.