Langevich, H. Letter, To: Sister Olya From: Mother Helena Langevich, December 10, 1915.
Chicagoスタイル(17版)引用形式Langevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, December 10, 1915.
MLA(8版)引用形式Langevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, December 10, 1915.
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