Cita APA (7th ed.)

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.