APA (7th ed.) Citation

Kovalenko, O., & Rakhno, O. (2018). Chernihiv region at the First World War.

Chicago Style (17th ed.) Citation

Kovalenko, O., and O. Rakhno. Chernihiv Region at the First World War. 2018.

MLA (8th ed.) Citation

Kovalenko, O., and O. Rakhno. Chernihiv Region at the First World War. 2018.

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