Gabler, R. E. (2004). Essentials of physical geography. Belmont, CA: Thomson Books/Cole.
Trích dẫn kiểu ChicagoGabler, Robert E. Essentials of Physical Geography. Belmont, CA: Thomson Books/Cole, 2004.
MLA引文Gabler, Robert E. Essentials of Physical Geography. Belmont, CA: Thomson Books/Cole, 2004.
警告:這些引文格式不一定是100%准確.