APA (7th ed.) Citation

Essen, A. (2015, January). On the Polish-Slovak relations 1938–1939. Theatrum Historiae.

Chicago Style (17th ed.) Citation

Essen, Andrzej. "On the Polish-Slovak Relations 1938–1939." Theatrum Historiae Jan. 2015.

MLA (9th ed.) Citation

Essen, Andrzej. "On the Polish-Slovak Relations 1938–1939." Theatrum Historiae, Jan. 2015.

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