Cita APA (7th ed.)

Zonis, M., & Semler, D. (1992). The East European opportunity: The complete business guide and sourcebook. Wiley.

Cita Chicago (17th ed.)

Zonis, Marvin, i Dwight Semler. The East European Opportunity: The Complete Business Guide and Sourcebook. New York: Wiley, 1992.

Cita MLA (8th ed.)

Zonis, Marvin, i Dwight Semler. The East European Opportunity: The Complete Business Guide and Sourcebook. Wiley, 1992.