MLA

Cowles, Edward Spencer, and Maurice Maeterlinck. Don't Be Afraid! How to Get Rid of Fear and Fatigue. Revised edition New York: Wilcox & Follet, 1948.

APA

Cowles, E. Spencer, & Maeterlinck, M. (1948). Don't be afraid! How to get rid of fear and fatigue. Revised edition New York: Wilcox & Follet.

Chicago

Cowles, Edward Spencer, and Maurice Maeterlinck. Don't Be Afraid! How to Get Rid of Fear and Fatigue. Revised edition New York: Wilcox & Follet, 1948.