APA

Keller F. J., . (1953). The double-purpose high school: closing the gap between vocational and academic preparation. New York: Harper.

Chicago

Keller Franklin Jefferson, . 1953. The double-purpose high school: closing the gap between vocational and academic preparation. New York: Harper.

Harvard

Keller F. J., . (1953). The double-purpose high school: closing the gap between vocational and academic preparation. New York: Harper.

MLA

Keller Franklin Jefferson, . The double-purpose high school: closing the gap between vocational and academic preparation. New York: Harper. 1953.