International Symposium on Biotechnology Bratislava, Czechoslovakia, Blažej, A., & Prívarová, V. (1991). Environmental biotechnology: Proceedings of the International Symposium on Biotechnology, Bratislava, Czecho-Slovakia, June 27-29, 1990. Elsevier.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Symposium on Biotechnology Bratislava, Czechoslovakia, Anton Blažej, و V. Prívarová. Environmental Biotechnology: Proceedings of the International Symposium on Biotechnology, Bratislava, Czecho-Slovakia, June 27-29, 1990. Amsterdam ; New York: Elsevier, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Symposium on Biotechnology Bratislava, Czechoslovakia, et al. Environmental Biotechnology: Proceedings of the International Symposium on Biotechnology, Bratislava, Czecho-Slovakia, June 27-29, 1990. Elsevier, 1991.