VIAF http://viaf.org/viaf/306258090
Fuente consultada Cowboys & aliens, 2011
Información encontrada créditos de la película(directed by Jon Favreau ; produced by Brian Grazer, Ron Howard, Alex Kutzman, Roberto Orci, Scott Mitchell Rosenbere ; screenplay by Robert Orci, Alex Kutzman, Damon Lindelof, Mark Fergus, Hawk Ostby ; director of photography Matthew Libatique ; music by Harry Gregson-Williams)