Cita APA (7th ed.)

Maps.com (Firm) & ebrary, Inc. (1997). Hamburg. Maps.com.

Cita Chicago (17th ed.)

Maps.com (Firm) i Inc ebrary. Hamburg. [S.l.]: Maps.com, 1997.

Cita MLA (9th ed.)

Maps.com (Firm) i Inc ebrary. Hamburg. Maps.com, 1997.