ISHS International Asparagus Symposium Ferrara (Italy), International Society for Horticultural Science. Working Group Asparagus, Eucarpia, Research Institute for Vegetable Crops (Milan (Italy)), ERSO. Ente per la ricerca, la sperimentazione e la divulgazione in ortoflorofrutticoltura e sementi, Centro operativo ortofrutticolo di Ferrara, . . . Schiavi, M. (1990). 7th International Asparagus Symposium: Ferrara, Italy, June 19-23, 1989. Secretary-General of ISHS.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ISHS International Asparagus Symposium Ferrara (Italy), International Society for Horticultural Science. Working Group Asparagus, Eucarpia, Research Institute for Vegetable Crops (Milan (Italy)), la sperimentazione e la divulgazione in ortoflorofrutticoltura e sementi ERSO. Ente per la ricerca, Centro operativo ortofrutticolo di Ferrara, A. Falavigna, و Massimo Schiavi. 7th International Asparagus Symposium: Ferrara, Italy, June 19-23, 1989. Wageningen, Netherlands: Secretary-General of ISHS, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)ISHS International Asparagus Symposium Ferrara (Italy), et al. 7th International Asparagus Symposium: Ferrara, Italy, June 19-23, 1989. Secretary-General of ISHS, 1990.