Cita APA (7th ed.)

Hacker, L. M. (1968). The world of Andrew Carnegie, 1865-1901. Lippicott.

Cita Chicago (17th ed.)

Hacker, Louis Morton. The World of Andrew Carnegie, 1865-1901. Philadelphia: Lippicott, 1968.

Cita MLA (8th ed.)

Hacker, Louis Morton. The World of Andrew Carnegie, 1865-1901. Lippicott, 1968.