Cita APA (7a ed.)

Heck, H. J. (1969). The international business environment: A management guide. American Management Association.

Cita Chicago Style (17a ed.)

Heck, Harold Joseph. The International Business Environment: A Management Guide. New York: American Management Association, 1969.

Cita MLA (9a ed.)

Heck, Harold Joseph. The International Business Environment: A Management Guide. American Management Association, 1969.