Cita APA (7th ed.)

Maps.com (Firm) & ebrary, Inc. (2000). Great Depression, 1929-1939. Maps.com.

Cita Chicago (17th ed.)

Maps.com (Firm) i Inc ebrary. Great Depression, 1929-1939. [S.l.]: Maps.com, 2000.

Cita MLA (9th ed.)

Maps.com (Firm) i Inc ebrary. Great Depression, 1929-1939. Maps.com, 2000.