Gay, P. (1974). Style in history. McGraw-Hill.
Chicago Style (17th ed.) ZitazioaGay, Peter. Style in History. New York: McGraw-Hill, 1974.
MLA (9th ed.) ZitazioaGay, Peter. Style in History. McGraw-Hill, 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.