APA (7th ed.) Citation

(1980). The DOS manual: Disk operating system, Apple II. National Book Store.

Chicago Style (17th ed.) Citation

The DOS Manual: Disk Operating System, Apple II. Manila: National Book Store, 1980.

MLA (9th ed.) Citation

The DOS Manual: Disk Operating System, Apple II. National Book Store, 1980.

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