Crockett, J. U., Donovan, H., Merrilees, R. A., & Wolff, B. (1979). Landscape gardening. Time-Life.
Lua i Stíl Chicago (17ú heag.)Crockett, James Underwood, Hedley Donovan, Rebecca A. Merrilees, agus Barbara Wolff. Landscape Gardening. Virginia: Time-Life, 1979.
Lua MLA (9ú heag.)Crockett, James Underwood, et al. Landscape Gardening. Time-Life, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.