MLA

Johnson, Wendell, and Ralph R Leutenegger. Stuttering In Children and Adults : Thirty Years of Research At the University of Iowa. Minneapolis (Minn): University of Minnesota Press, 1955.

APA

Johnson, W., & Leutenegger, R. R. (1955). Stuttering in children and adults : thirty years of research at the University of Iowa. Minneapolis (Minn): University of Minnesota Press.

Chicago

Johnson, Wendell, and Ralph R Leutenegger. Stuttering In Children and Adults: Thirty Years of Research At the University of Iowa. Minneapolis (Minn): University of Minnesota Press, 1955.