APA

Wells H. G., Wells G. P., . (1939). The science of life. New York: Garden City publishing co., inc.

Chicago

Wells H G, Wells G P, . 1939. The science of life. New York: Garden City publishing co., inc.

Harvard

Wells H. G., Wells G. P., . (1939). The science of life. New York: Garden City publishing co., inc.

MLA

Wells H G, Wells G P, . The science of life. New York: Garden City publishing co., inc. 1939.