APA

Crannell P. W., . (1915). The survival of the unfit: powers, principles, and practice in man-making. New York: Hodder & Stoughton, George H. Doran company.

Chicago

Crannell Philip Wendell, . 1915. The survival of the unfit: powers, principles, and practice in man-making. New York: Hodder & Stoughton, George H. Doran company.

Harvard

Crannell P. W., . (1915). The survival of the unfit: powers, principles, and practice in man-making. New York: Hodder & Stoughton, George H. Doran company.

MLA

Crannell Philip Wendell, . The survival of the unfit: powers, principles, and practice in man-making. New York: Hodder & Stoughton, George H. Doran company. 1915.