Cita APA (7th ed.)

Belt, E., Steinitz, K. T., & Archer, M. (1951). Leonardo da Vinci. International Business Machines Corp..

Cita Chicago (17th ed.)

Belt, Elmer, Kate Traumann Steinitz, i Margot Archer. Leonardo Da Vinci. [New York]: International Business Machines Corp., 1951.

Cita MLA (9th ed.)

Belt, Elmer, et al. Leonardo Da Vinci. International Business Machines Corp., 1951.