Cita APA (7th ed.)
Maps.com (Firm) & ebrary, Inc. (1997). Beijing. Maps.com.
Cita Chicago (17th ed.)
Maps.com (Firm) i Inc ebrary. Beijing. [S.l.]: Maps.com, 1997.
Cita MLA (9th ed.)
Maps.com (Firm) i Inc ebrary. Beijing. Maps.com, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.