George B. Johnson. (2000). The living world. Boston, MA: McGraw-Hill.
Trích dẫn kiểu ChicagoGeorge B. Johnson. The Living World. Boston, MA: McGraw-Hill, 2000.
MLA引文George B. Johnson. The Living World. Boston, MA: McGraw-Hill, 2000.
警告：這些引文格式不一定是100％准確.