Georgoulis, E. H., Iske, A., & Levesley, J. (2011). Approximation algorithms for complex systems: Proceedings of the 6th international conference on algorithms for approximation, Ambleside, UK, 31st August - 4th September 2009. Springer Berlin Heidelberg.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Georgoulis, Emmanuil H., A. Iske, و Jeremy Levesley. Approximation Algorithms for Complex Systems: Proceedings of the 6th International Conference on Algorithms for Approximation, Ambleside, UK, 31st August - 4th September 2009. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Georgoulis, Emmanuil H., et al. Approximation Algorithms for Complex Systems: Proceedings of the 6th International Conference on Algorithms for Approximation, Ambleside, UK, 31st August - 4th September 2009. Springer Berlin Heidelberg, 2011.