Hetman Ivan Mazepa and his era.

MLA

Ohloblyn, Olexander. Hetman Ivan Mazepa and His Era. New York,: Organization for Defense of Four Freedoms of Ukraine, 1960.

APA

Ohloblyn, O. (1960). Hetman Ivan Mazepa and his era. New York,: Organization for Defense of Four Freedoms of Ukraine.

Chicago

Ohloblyn, Olexander Hetman Ivan Mazepa and His Era. New York,: Organization for Defense of Four Freedoms of Ukraine, 1960.