APA (7th ed.) Citation

Papakin, H. V. (2012). The OUN and UPA History Sources: Classification Problems, Content of the Insurgent Origin Documents.

Chicago Style (17th ed.) Citation

Papakin, H. V. The OUN and UPA History Sources: Classification Problems, Content of the Insurgent Origin Documents. 2012.

MLA (8th ed.) Citation

Papakin, H. V. The OUN and UPA History Sources: Classification Problems, Content of the Insurgent Origin Documents. 2012.

Warning: These citations may not always be 100% accurate.