Tugwell, F. (1976). Venezuelan foreign policy. s.n..
Lua i Stíl Chicago (17ú heag.)Tugwell, Franklin. Venezuelan Foreign Policy. [S.l.: s.n., 1976.
Lua MLA (8ú heag.)Tugwell, Franklin. Venezuelan Foreign Policy. s.n., 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.