Langevich, H. Letter, To: Sister Olya From: Mother Helena Langevich, May 8, 1912.
Chicago Style aipamenaLangevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, May 8, 1912.
MLA aipamenaLangevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, May 8, 1912.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.