APA (7th ed.) Citation

Ratner, G. L., Dunin, J., & Dunin, C. (1975). Ex Libris Cecyli I Janusza Duninów.

Chicago Style (17th ed.) Citation

Ratner, German L'vovič, Janusz Dunin, and Cecylia Dunin. Ex Libris Cecyli I Janusza Duninów. 1975.

MLA (9th ed.) Citation

Ratner, German L'vovič, et al. Ex Libris Cecyli I Janusza Duninów. 1975.