APA-čujuhus (7. p.)
Schaffer, R., Agusti, F., & Earle, B. (1990). International business law and its environment. West Pub. Co..
Chicago-čujuhus (17. p.)
Schaffer, Richard, Filiberto Agusti, juo Beverley Earle. International Business Law and Its Environment. St. Paul: West Pub. Co., 1990.
MLA-čujuhus (9. p.)
Schaffer, Richard, et al. International Business Law and Its Environment. West Pub. Co., 1990.
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