APA

Umbreit M. H., . (1952). Fundamentals of economics. New York: McGraw-Hill.

Chicago

Umbreit Myron Henry, . 1952. Fundamentals of economics. New York: McGraw-Hill.

Harvard

Umbreit M. H., . (1952). Fundamentals of economics. New York: McGraw-Hill.

MLA

Umbreit Myron Henry, . Fundamentals of economics. New York: McGraw-Hill. 1952.