APA

Spahr W. E., Bader L., . (1934). Economic principles and problems. New York: Farrah and Rinehart.

Chicago

Spahr Walter Earl, Bader Louis, . 1934. Economic principles and problems. New York: Farrah and Rinehart.

Harvard

Spahr W. E., Bader L., . (1934). Economic principles and problems. New York: Farrah and Rinehart.

MLA

Spahr Walter Earl, Bader Louis, . Economic principles and problems. New York: Farrah and Rinehart. 1934.