APA (7th ed.) Citation

Digital Equipment Corporation. (1989). Systems and options catalogue {Catalogue}: Summer/Autumn 1989 (European edition.). European Field Communications Group.

Chicago Style (17th ed.) Citation

Digital Equipment Corporation. Systems and Options Catalogue {Catalogue}: Summer/Autumn 1989. European edition. Reading: European Field Communications Group, 1989.

MLA (8th ed.) Citation

Digital Equipment Corporation. Systems and Options Catalogue {Catalogue}: Summer/Autumn 1989. European edition. European Field Communications Group, 1989.