Cita APA (7th ed.)

Matthews, M. S. (1990). EXCEL 2.1 made easy: IBM PC version. Osborne/McGraw-Hill.

Cita Chicago (17th ed.)

Matthews, Martin S. EXCEL 2.1 Made Easy: IBM PC Version. Berkeley: Osborne/McGraw-Hill, 1990.

Cita MLA (9th ed.)

Matthews, Martin S. EXCEL 2.1 Made Easy: IBM PC Version. Osborne/McGraw-Hill, 1990.