Maps.com (Firm) & ebrary, Inc. (2001). Houston area. Maps.com.
Lua i Stíl Chicago (17ú heag.)Maps.com (Firm) agus Inc ebrary. Houston Area. [S.l.]: Maps.com, 2001.
Lua MLA (9ú heag.)Maps.com (Firm) agus Inc ebrary. Houston Area. Maps.com, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.