Keck, W. C. (1968). Peace Corps Tuberculosis control - Program in the yungas Area of Bolivia. s.n.
芝加哥风格引文Keck, William C. Peace Corps Tuberculosis Control - Program in the Yungas Area of Bolivia. La Paz: s.n, 1968.
MLA引文Keck, William C. Peace Corps Tuberculosis Control - Program in the Yungas Area of Bolivia. s.n, 1968.
警告：这些引文格式不一定是100％准确.