Tim. (1979). Writing letters in English a practical guide. HK.: Oxford university press.
Chicago Style aipamenaTim. Writing Letters in English a Practical Guide. HK.: Oxford university press, 1979.
MLA aipamenaTim. Writing Letters in English a Practical Guide. HK.: Oxford university press, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.