APA

Thralls Z. A., . (1958). The teaching of geography. New York: Appleton-Century-Crofts.

Chicago

Thralls Zoe Agnes, . 1958. The teaching of geography. New York: Appleton-Century-Crofts.

Harvard

Thralls Z. A., . (1958). The teaching of geography. New York: Appleton-Century-Crofts.

MLA

Thralls Zoe Agnes, . The teaching of geography. New York: Appleton-Century-Crofts. 1958.