APA

Parkhill D. F., . (1966). The challenge of the computer utility. Reading, Mass: Addison-Wesley Pub. Co.

Chicago

Parkhill D F, . 1966. The challenge of the computer utility. Reading, Mass: Addison-Wesley Pub. Co.

Harvard

Parkhill D. F., . (1966). The challenge of the computer utility. Reading, Mass: Addison-Wesley Pub. Co.

MLA

Parkhill D F, . The challenge of the computer utility. Reading, Mass: Addison-Wesley Pub. Co. 1966.