Cita APA (7th ed.)

LEEDS, H. D. Computer programmig Fundamentals: Based on the IBM System. McGraw-Hill.

Cita Chicago (17th ed.)

LEEDS, Herbert D. Computer Programmig Fundamentals: Based on the IBM System. New York: McGraw-Hill.

Cita MLA (9th ed.)

LEEDS, Herbert D. Computer Programmig Fundamentals: Based on the IBM System. McGraw-Hill.