Enger, F. (1957). Letters for special occasions. Mc Graw Hill.
Chicago Style aipamenaEnger, Frank. Letters for Special Occasions. New York: Mc Graw Hill, 1957.
MLA aipamenaEnger, Frank. Letters for Special Occasions. Mc Graw Hill, 1957.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.