Symposium on Winter Hardiness in Woody Perennials Piikiö, Finland, International Society for Horticultural Science. Section for Fruit, International Society for Horticultural Science. Working Group Winterhardiness in Woody Perrennials, Holubowicz, T., & Säkö, J. (1985). Second Symposium on Winterhardiness in Woody Perennials: Piikiö, Finland, 13-17 August 1984. ISHS].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium on Winter Hardiness in Woody Perennials Piikiö, Finland, International Society for Horticultural Science. Section for Fruit, International Society for Horticultural Science. Working Group Winterhardiness in Woody Perrennials, T. Holubowicz, و J. Säkö. Second Symposium on Winterhardiness in Woody Perennials: Piikiö, Finland, 13-17 August 1984. [Wageningen, Netherlands: ISHS], 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Symposium on Winter Hardiness in Woody Perennials Piikiö, Finland, et al. Second Symposium on Winterhardiness in Woody Perennials: Piikiö, Finland, 13-17 August 1984. ISHS], 1985.