Cita APA (7th ed.)

Kalay, Y. E. (1987). Graphic introduction to programming. Wiley.

Cita Chicago (17th ed.)

Kalay, Yehuda E. Graphic Introduction to Programming. New York: Wiley, 1987.

Cita MLA (9th ed.)

Kalay, Yehuda E. Graphic Introduction to Programming. Wiley, 1987.