Foster, M. (1982). Creating patterns from grasses, seeheads and cones. Pelham Books.
Chicago-referens (17:e uppl.)Foster, Maureen. Creating Patterns from Grasses, Seeheads and Cones. Singapore: Pelham Books, 1982.
MLA-referens (9:e uppl.)Foster, Maureen. Creating Patterns from Grasses, Seeheads and Cones. Pelham Books, 1982.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.