Cita APA (7a ed.)

Maps.com (Firm) & ebrary, Inc. (2001). Washington D.C. area. Maps.com.

Cita Chicago Style (17a ed.)

Maps.com (Firm) y Inc ebrary. Washington D.C. Area. [S.l.]: Maps.com, 2001.

Cita MLA (9a ed.)

Maps.com (Firm) y Inc ebrary. Washington D.C. Area. Maps.com, 2001.