European Conference on on Intellectual Capital Helsinki, Finland, & Surakka, J. (2012). Proceedings of the 4th European Conference on Intellectual Capital: Arcada University of Applied Sciences, Helsinki, Finland, 23-24 April 2012. Academic Publishing International.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)European Conference on on Intellectual Capital Helsinki, Finland, و Jukka Surakka. Proceedings of the 4th European Conference on Intellectual Capital: Arcada University of Applied Sciences, Helsinki, Finland, 23-24 April 2012. Reading: Academic Publishing International, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)European Conference on on Intellectual Capital Helsinki, Finland, و Jukka Surakka. Proceedings of the 4th European Conference on Intellectual Capital: Arcada University of Applied Sciences, Helsinki, Finland, 23-24 April 2012. Academic Publishing International, 2012.