Balka, K. (2011). Open Source Product Development: The Meaning and Relevance of Openness. Gabler. https://doi.org/10.1007/978-3-8349-6949-1
Lua i Stíl Chicago (17ú heag.)Balka, Kerstin. Open Source Product Development: The Meaning and Relevance of Openness. Wiesbaden: Gabler, 2011. https://doi.org/10.1007/978-3-8349-6949-1.
Lua MLA (9ú heag.)Balka, Kerstin. Open Source Product Development: The Meaning and Relevance of Openness. Gabler, 2011. https://doi.org/10.1007/978-3-8349-6949-1.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.