APA ציטוט

Heilbroner, R. L. (1981). Five economic challenges. New Jersey: Prentice-Hall, Inc.

Trích dẫn kiểu Chicago

Heilbroner, Robert L. Five Economic Challenges. New Jersey: Prentice-Hall, Inc, 1981.

ציטוט MLA

Heilbroner, Robert L. Five Economic Challenges. New Jersey: Prentice-Hall, Inc, 1981.