Cummins. To the Vast and Beautiful Land. Texas A&M University Press.
Chicago Style (17th ed.) ZitazioaCummins. To the Vast and Beautiful Land. Texas A&M University Press.
MLA (9th ed.) ZitazioaCummins. To the Vast and Beautiful Land. Texas A&M University Press.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.