APA

WARD B., . (1959). Five Ideas That Change The World. london: new york.

Chicago

WARD BARBARA, . 1959. Five Ideas That Change The World. london: new york.

Harvard

WARD B., . (1959). Five Ideas That Change The World. london: new york.

MLA

WARD BARBARA, . Five Ideas That Change The World. london: new york. 1959.