Langevich, H. Letter, To: Sister Olya From: Mother Helena Langevich, [n.d.].
Chicago-стиль цитированияLangevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, [n.d.].
MLA-цитированиеLangevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, [n.d.].
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.