APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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