Symposium on Horticultural Economics Hamburg, Germany, Schenk, E. W., & Ostendorf, H. D. (1983). Seventh Symposium on Horticultural Economics: 21st International Horticultural Congress, 29 August -4 September 1982, Hamburg, Fed. Rep. of Germany. International Society for Horticultural Science, Commission for Horticultural Economics.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Symposium on Horticultural Economics Hamburg, Germany, E. W. Schenk, và H. D. Ostendorf. Seventh Symposium on Horticultural Economics: 21st International Horticultural Congress, 29 August -4 September 1982, Hamburg, Fed. Rep. of Germany. Wageningen, Netherlands: International Society for Horticultural Science, Commission for Horticultural Economics, 1983.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Symposium on Horticultural Economics Hamburg, Germany, et al. Seventh Symposium on Horticultural Economics: 21st International Horticultural Congress, 29 August -4 September 1982, Hamburg, Fed. Rep. of Germany. International Society for Horticultural Science, Commission for Horticultural Economics, 1983.