APA aipamena

Langevich, H. Letter, To: Sister Olya From: Mother Helena Langevich, [n.d.].

Chicago Style aipamena

Langevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, [n.d.].

MLA aipamena

Langevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, [n.d.].

Kontuz: berrikusi erreferentzia hauek erabili aurretik.