Kovalets, L. (2011). Letters of Hryhorii Kupchanko to Ivan Yaroshynskyi and His Spouse Yevheniya Yaroshynska as a Complement of the Kupchanko and Yaroshynska Portraits (An Endeavour of Presentation).
Чикаго стиль цитування (17-те видання)Kovalets, L. Letters of Hryhorii Kupchanko to Ivan Yaroshynskyi and His Spouse Yevheniya Yaroshynska as a Complement of the Kupchanko and Yaroshynska Portraits (An Endeavour of Presentation). 2011.
Стиль цитування MLA (8-ме видання)Kovalets, L. Letters of Hryhorii Kupchanko to Ivan Yaroshynskyi and His Spouse Yevheniya Yaroshynska as a Complement of the Kupchanko and Yaroshynska Portraits (An Endeavour of Presentation). 2011.
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