Falk, P. S. (1987). Petroleum and Mexico's future. Westview Press.
Lua i Stíl Chicago (17ú heag.)Falk, Pamela S. Petroleum and Mexico's Future. Boulder: Westview Press, 1987.
Lua MLA (9ú heag.)Falk, Pamela S. Petroleum and Mexico's Future. Westview Press, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.