Cita APA (7a ed.)

CALLAHAN, M., & NICKANIS. (1990). Guide to shareware: Dr. File Finders. McGraw Hill.

Cita Chicago Style (17a ed.)

CALLAHAN, Mike, y NICKANIS. Guide to Shareware: Dr. File Finders. New York: McGraw Hill, 1990.

Cita MLA (9a ed.)

CALLAHAN, Mike, y NICKANIS. Guide to Shareware: Dr. File Finders. McGraw Hill, 1990.