APA
Baerwald T. J., . (1993). World geography. New Jersey: Prentice Hall.
Chicago
Baerwald Thomas J, . 1993. World geography. New Jersey: Prentice Hall.
Harvard
Baerwald T. J., . (1993). World geography. New Jersey: Prentice Hall.
MLA
Baerwald Thomas J, . World geography. New Jersey: Prentice Hall. 1993.