world health orginization. (1969). Arican trypanosomiasis. Geneva.
Chicago Edition Citationworld health orginization. Arican Trypanosomiasis. Geneva, 1969.
MLA引文world health orginization. Arican Trypanosomiasis. Geneva, 1969.
警告：這些引文格式不一定是100％准確.
APA引文