Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Maps.com (Firm) y Inc ebrary. Avalon. [S.l.]: Maps.com, 1997.

Cita MLA (9a ed.)

Maps.com (Firm) y Inc ebrary. Avalon. Maps.com, 1997.