Jensen, D. (2004). A language older than words. Vermont: Chelsea Green.
Trích dẫn kiểu ChicagoJensen, Derrick. A Language Older Than Words. Vermont: Chelsea Green, 2004.
MLA引文Jensen, Derrick. A Language Older Than Words. Vermont: Chelsea Green, 2004.
警告:這些引文格式不一定是100%准確.