APA (7th ed.) Citation

Brunngraber, R., Paul, E., & Paul, C. (1933). Karl and the twentieth century. W. Morrow and company.

Chicago Style (17th ed.) Citation

Brunngraber, Rudolf, Eden Paul, and Cedar Paul. Karl and the Twentieth Century. New York: W. Morrow and company, 1933.

MLA (9th ed.) Citation

Brunngraber, Rudolf, et al. Karl and the Twentieth Century. W. Morrow and company, 1933.