APA (7th ed.) Citation

Blokdijk, A., & Blokdijk, P. (1991). Planning and design of information systems. Academic.

Chicago Style (17th ed.) Citation

Blokdijk, André, and Paul Blokdijk. Planning and Design of Information Systems. [Place of publication not identified]: Academic, 1991.

MLA (9th ed.) Citation

Blokdijk, André, and Paul Blokdijk. Planning and Design of Information Systems. Academic, 1991.