Krooss, H. E., & Gilbert, C. (1972). American business history. Prentice-Hall.
Cita Chicago (17th ed.)Krooss, Herman Edward, i Charles Gilbert. American Business History. Englewood, N.J.: Prentice-Hall, 1972.
Cita MLA (8th ed.)Krooss, Herman Edward, i Charles Gilbert. American Business History. Prentice-Hall, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.