APA

Dreikurs R., . (1948). The challenge of parenthood. New York: Duell, Sloan and Pearce.

Chicago

Dreikurs Rudolf, . 1948. The challenge of parenthood. New York: Duell, Sloan and Pearce.

Harvard

Dreikurs R., . (1948). The challenge of parenthood. New York: Duell, Sloan and Pearce.

MLA

Dreikurs Rudolf, . The challenge of parenthood. New York: Duell, Sloan and Pearce. 1948.