APA
Pulsipher L. M., Pulsipher A. & Goodwin C. M. (2002). World regional geography. New York: W.H. Freeman.
Chicago
Pulsipher Lydia M, Pulsipher Alex and Goodwin Conrad M. 2002. World regional geography. New York: W.H. Freeman.
Harvard
Pulsipher L. M., Pulsipher A. and Goodwin C. M. (2002). World regional geography. New York: W.H. Freeman.
MLA
Pulsipher Lydia M, Pulsipher Alex and Goodwin Conrad M. World regional geography. New York: W.H. Freeman. 2002.