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.
Chicago-viite (17. p.)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, ja Massimo Schiavi. 7th International Asparagus Symposium: Ferrara, Italy, June 19-23, 1989. Wageningen, Netherlands: Secretary-General of ISHS, 1990.
MLA-viite (8. p.)ISHS International Asparagus Symposium Ferrara (Italy), et al. 7th International Asparagus Symposium: Ferrara, Italy, June 19-23, 1989. Secretary-General of ISHS, 1990.