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.