APA

Hoover E. M., . (1968). The location of economic activity. New York: McGraw-Hill.

Chicago

Hoover Edgar M, . 1968. The location of economic activity. New York: McGraw-Hill.

Harvard

Hoover E. M., . (1968). The location of economic activity. New York: McGraw-Hill.

MLA

Hoover Edgar M, . The location of economic activity. New York: McGraw-Hill. 1968.