Guy, G. S. (1957). A descriptive and comparative study of the economic life of the mountain tribes of Northern Luzon, Philippines.
Lua i Stíl Chicago (17ú heag.)Guy, George Sy-chuan. A Descriptive and Comparative Study of the Economic Life of the Mountain Tribes of Northern Luzon, Philippines. 1957.
Lua MLA (9ú heag.)Guy, George Sy-chuan. A Descriptive and Comparative Study of the Economic Life of the Mountain Tribes of Northern Luzon, Philippines. 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.