Ladd, E. C. (1975). The divided academy. Norton.
Chicago Style (17th ed.) ZitazioaLadd, Everett Carll. The Divided Academy. NewYork: Norton, 1975.
MLA (9th ed.) ZitazioaLadd, Everett Carll. The Divided Academy. Norton, 1975.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.