Petryshyn, W. R., & Chomiak, N. (1984). Political writings of post-World War Two Ukrainian émigrés: Annotated bibliography and guide to research. Edmonton, Alta.: Canadian Institute of Ukrainian Studies, University of Alberta.

Petryshyn, W. Roman, and Natalia Chomiak. Political Writings of Post-World War Two Ukrainian Émigrés: Annotated Bibliography and Guide to Research. Edmonton, Alta.: Canadian Institute of Ukrainian Studies, University of Alberta, 1984.

Petryshyn, W. Roman, and Natalia Chomiak. Political Writings of Post-World War Two Ukrainian Émigrés: Annotated Bibliography and Guide to Research. Edmonton, Alta.: Canadian Institute of Ukrainian Studies, University of Alberta, 1984.