David Stewart. (2009). How a Seed Grows Into a Sunflower (Amaze (Paperback)) (UK ed.). Book House.
Chicago-referens (17:e uppl.)David Stewart. How a Seed Grows Into a Sunflower (Amaze (Paperback)). UK ed. Book House, 2009.
MLA-referens (9:e uppl.)David Stewart. How a Seed Grows Into a Sunflower (Amaze (Paperback)). UK ed. Book House, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.