De Looff, L. A. (1997). Information systems outsourcing decision making: A managerial approach. Idea Group Pub.
Lua i Stíl Chicago (17ú heag.)De Looff, L. A. Information Systems Outsourcing Decision Making: A Managerial Approach. Hershey, Penn: Idea Group Pub, 1997.
Lua MLA (9ú heag.)De Looff, L. A. Information Systems Outsourcing Decision Making: A Managerial Approach. Idea Group Pub, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.