Lusk, H. F., & Hewitt, C. M. (1982). Business law and the regulatory environment: Concepts and cases (5th ed.). Richard D. Irwin.

Lusk, Harold F., and Charles M. Hewitt. Business Law and the Regulatory Environment: Concepts and Cases. 5th ed. Illinois: Richard D. Irwin, 1982.

Lusk, Harold F., and Charles M. Hewitt. Business Law and the Regulatory Environment: Concepts and Cases. 5th ed. Richard D. Irwin, 1982.