APA (7th ed.) Citation

(1991). Alpha four: The fully relational database for non-programmers (Version 2.). Alpha Software Corp..

Chicago Style (17th ed.) Citation

Alpha Four: The Fully Relational Database for Non-programmers. Version 2. Burlington, MA: Alpha Software Corp., 1991.

MLA (9th ed.) Citation

Alpha Four: The Fully Relational Database for Non-programmers. Version 2. Alpha Software Corp., 1991.

Warning: These citations may not always be 100% accurate.