APA

Heilbroner R. L., . (1968). Understanding Macroeconomics. New Jersey: Prentice-Hall, Inc.

Chicago

Heilbroner Robert L, . 1968. Understanding Macroeconomics. New Jersey: Prentice-Hall, Inc.

Harvard

Heilbroner R. L., . (1968). Understanding Macroeconomics. New Jersey: Prentice-Hall, Inc.

MLA

Heilbroner Robert L, . Understanding Macroeconomics. New Jersey: Prentice-Hall, Inc. 1968.