Brzezinski, W., & Piotrowski, W. (1997). Proceedings of the First International Symposium on Wood Tar and Pitch: Held by the Biskupin Museum (department of the State Archaeological Museum in Warsaw) and the Museumsdorf Düppel (Berlin) at Biskupin Museum, Poland July 1st - 4th 1993 / ed. by Wojciech Brzrzinski, Wojciech Piotrowski.
Cita Chicago (17th ed.)Brzezinski, Wojciech, i Wojciech Piotrowski. Proceedings of the First International Symposium on Wood Tar and Pitch: Held by the Biskupin Museum (department of the State Archaeological Museum in Warsaw) and the Museumsdorf Düppel (Berlin) at Biskupin Museum, Poland July 1st - 4th 1993 / Ed. by Wojciech Brzrzinski, Wojciech Piotrowski. Warszawa, 1997.
Cita MLA (8th ed.)Brzezinski, Wojciech, i Wojciech Piotrowski. Proceedings of the First International Symposium on Wood Tar and Pitch: Held by the Biskupin Museum (department of the State Archaeological Museum in Warsaw) and the Museumsdorf Düppel (Berlin) at Biskupin Museum, Poland July 1st - 4th 1993 / Ed. by Wojciech Brzrzinski, Wojciech Piotrowski. 1997.