APA Цитирование

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

Chicago-стиль цитирования

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

MLA-цитирование

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

Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.