Langevich, H. Letter, To: Sister Olya From: Mother Helena Langevich, December 10, 1915.
Chicago Style aipamenaLangevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, December 10, 1915.
MLA aipamenaLangevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, December 10, 1915.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.