APA

Clemensen J. W., . (1957). Your health and safety. New York: Hartcourt, Brace.

Chicago

Clemensen Jessie Williams, . 1957. Your health and safety. New York: Hartcourt, Brace.

Harvard

Clemensen J. W., . (1957). Your health and safety. New York: Hartcourt, Brace.

MLA

Clemensen Jessie Williams, . Your health and safety. New York: Hartcourt, Brace. 1957.