APA (7th ed.) Citation

Digital Equipment Corporation. (2009). Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) October, 1960. Project Gutenberg.

Chicago Style (17th ed.) Citation

Digital Equipment Corporation. Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) October, 1960. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Digital Equipment Corporation. Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) October, 1960. Project Gutenberg, 2009.

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