APA-referens (7:e uppl.)

International Horticultural Congress The Hague. (1956). Report. H. Veenman.

Chicago-referens (17:e uppl.)

International Horticultural Congress The Hague. Report. Wageningen, Netherlands: H. Veenman, 1956.

MLA-referens (8:e uppl.)

International Horticultural Congress The Hague. Report. H. Veenman, 1956.