APA (7th ed.) Citation

Chronologic Corp. (1990). Instant recall user's manual: Version 1.2 for IBM PC, XT, AT, PS/2 & compatibles. Chronologic Corp..

Chicago Style (17th ed.) Citation

Chronologic Corp. Instant Recall User's Manual: Version 1.2 for IBM PC, XT, AT, PS/2 & Compatibles. Tucson, AZ: Chronologic Corp., 1990.

MLA (9th ed.) Citation

Chronologic Corp. Instant Recall User's Manual: Version 1.2 for IBM PC, XT, AT, PS/2 & Compatibles. Chronologic Corp., 1990.

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