APA

ferguson j. h., . (1959). the american system. New York: mcGrow - hill.

Chicago

ferguson john h, . 1959. the american system. New York: mcGrow - hill.

Harvard

ferguson j. h., . (1959). the american system. New York: mcGrow - hill.

MLA

ferguson john h, . the american system. New York: mcGrow - hill. 1959.