APA

Ripley H., . (1935). Special ship project. New York-US: The institute of international education.

Chicago

Ripley Helen, . 1935. Special ship project. New York-US: The institute of international education.

Harvard

Ripley H., . (1935). Special ship project. New York-US: The institute of international education.

MLA

Ripley Helen, . Special ship project. New York-US: The institute of international education. 1935.