APA (7th ed.) Citation

Stryjec, R., & Roszak, E. (1971). Ex libris Eugenusz Roszak.

Chicago Style (17th ed.) Citation

Stryjec, Ryszard, and Eugeniusz Roszak. Ex Libris Eugenusz Roszak. 1971.

MLA (9th ed.) Citation

Stryjec, Ryszard, and Eugeniusz Roszak. Ex Libris Eugenusz Roszak. 1971.

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