APA (7th ed.) Citation

IBM. (1989). Informix-4GL Student Guide: Developing Applications Using. Informix Software.

Chicago Style (17th ed.) Citation

IBM. Informix-4GL Student Guide: Developing Applications Using. Informix Software, 1989.

MLA (8th ed.) Citation

IBM. Informix-4GL Student Guide: Developing Applications Using. Informix Software, 1989.

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