Bales, S. F. (1991). Burpee Americam gardening series annuals. Prentice Hall Press.
Lua i Stíl Chicago (17ú heag.)Bales, Suzanne Frutig. Burpee Americam Gardening Series Annuals. Prentice Hall Press, 1991.
Lua MLA (8ú heag.)Bales, Suzanne Frutig. Burpee Americam Gardening Series Annuals. Prentice Hall Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.