Squire, D. (1995). Annuals and biennials: An essential guide to these versatile and indispensable plants. Tiger Books International.
Chicago-referens (17:e uppl.)Squire, David. Annuals and Biennials: An Essential Guide to These Versatile and Indispensable Plants. London: Tiger Books International, 1995.
MLA-referens (9:e uppl.)Squire, David. Annuals and Biennials: An Essential Guide to These Versatile and Indispensable Plants. Tiger Books International, 1995.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.