APA način citiranja (7. izdanje)

Langevich, H. Letter, To: Sister Olya From: Mother Helena Langevich, May 13, 1912.

Čikaški stil citiranja (17. izdanje)

Langevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, May 13, 1912.

MLA način citiranja (8. izdanje)

Langevich, Helena. Letter, To: Sister Olya From: Mother Helena Langevich, May 13, 1912.

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