Dr. Bronner’s Magic Soapbox. DVD. Directed by Sara Lamm. Produced by Reckon So Productions, 2006.

Drachman, Virginia D. Enterprising Women: 250 Years of American Business. Chapel Hill: University of North Carolina Press, 2002.

Edgington, Denise. "Home Service." Des Moines Business Record 15, no. 9 (March 1, 1999).

Ermarth, Michael, ed. Kurt Wolff: A Portrait in Essays and Letters. Translated by Deborah Lucas Schneider. Chicago: The University of Chicago Press, 1991.

Esslinger, Hartmut. A Fine Line: How Design Strategies are Shaping the Future of Business. San Francisco: Jossey-Bass, 2009.

Esslinger, Hartmut. Design Forward: Creative Strategies for Sustainable Change. Stuttgart: Arnoldsche Art Publishers, 2012.

Esslinger, Hartmut. Keep it Simple: The Early Design Years of Apple. Stuttgart: Arnoldsche Art Publishers, 2014.

Fellman, Susanna. "Prosopographic studies of business leaders for understanding industrial and corporate change." Business History 56.1 (2014): 5-21.

Fox, Ted. In the Groove: The People Behind the Music. New York: St. Martin’s Press, 1986.

Frank, Werner L. Legacy: The Saga of a Jewish German Family Across Time and Circumstance. Bergenfield, NJ: Avotaynu, 2003.

Fritz, Michael. "Schwan’s Song." Forbes Magazine, April 3, 1989.

Gallun, Alby. "Kraft takes aim at Red Baron in pizza spy fight." Crain's Chicago Business , 24, no. 8 (February 19, 2001).

Gordon, Lorraine and Barry Singer. Alive at the Village Vanguard: My Life In and Out of Jazz Time. Milwaukee: Hal Leonard Corporation, 2006.

Griesbach, Werner. Spekon: Chronik Einer Firma. Seifhennersdorf: Spekon, 2007.

Hakala, William. One Friendship at a Time: The Amazing Growth of the Schwan Food Company. Afton, MN: Hakala Communications, 2004.

Harris, Leon. Merchant Princes: An Intimate History of Jewish Families Who Built Great Department Stores. New York: Harper & Row, 1979.

Hartmann, Susan. The Home Front and Beyond: American Women in the 1940s. Boston: Twayne Publishers, 1982.

Heenan, David A. "The Small Town: Corporate USA's new frontier." Corporate Board 12, no. 69 (July 1991).

Heintze, Beatrix. Walter Cramer: Ein Leipziger Unternehmer im Widerstand. Köln: Deutscher Instituts-Verlag, 1993.

Jaeger, Roland. The New Weimar on the Pacific: The Pazifische Presse and Exile Publishing 1942-48. Los Angeles: Victoria Dailey Publisher, 2000.