Gaya APA

Lientz, B, P., Swanson, E, B. (1980). Software maintenance management : a study of the maintenance of computer application software in 487 data processing organizations . London: .

Gaya MLA

Lientz, Bennet, P., Swanson, E., Burton. "Software maintenance management : a study of the maintenance of computer application software in 487 data processing organizations". London: , 1980. Text.