Lua APA (7ú heag.)

Valencia, L. B. (2001). Hubs and spokes tourism strategy. Manila Bulletin.

Lua i Stíl Chicago (17ú heag.)

Valencia, Lynda B. "Hubs and Spokes Tourism Strategy." Manila Bulletin 2001.

Lua MLA (9ú heag.)

Valencia, Lynda B. "Hubs and Spokes Tourism Strategy." Manila Bulletin, 2001.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.