Kuby, M., Gober, P., & Harner, J. (1998). Human geography in action. Wiley.
Lua i Stíl Chicago (17ú heag.)Kuby, Michael, Patricia Gober, agus John Harner. Human Geography in Action. New York: Wiley, 1998.
Lua MLA (9ú heag.)Kuby, Michael, et al. Human Geography in Action. Wiley, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.