Symposium on the Timing of Field Production of Vegetables Wageningen, Netherlands, International Society for Horticultural Science. Section Vegetables, Booij, R., & Dekker, P. H. M. (1990). Symposium on the Timing of Field Production of Vegetables: Wageningen, the Netherlands, August 21-25, 1989. International Society for Horticultural Science.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium on the Timing of Field Production of Vegetables Wageningen, Netherlands, International Society for Horticultural Science. Section Vegetables, R. Booij, و P. H. M. Dekker. Symposium on the Timing of Field Production of Vegetables: Wageningen, the Netherlands, August 21-25, 1989. Wageningen, Netherlands: International Society for Horticultural Science, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Symposium on the Timing of Field Production of Vegetables Wageningen, Netherlands, et al. Symposium on the Timing of Field Production of Vegetables: Wageningen, the Netherlands, August 21-25, 1989. International Society for Horticultural Science, 1990.