(1993). Kerr's cost data for landscape construction: Unit prices for site development (13th ed.). Van Nostrand Reinhold.
Lua i Stíl Chicago (17ú heag.)Kerr's Cost Data for Landscape Construction: Unit Prices for Site Development. 13th ed. New York: Van Nostrand Reinhold, 1993.
Lua MLA (9ú heag.)Kerr's Cost Data for Landscape Construction: Unit Prices for Site Development. 13th ed. Van Nostrand Reinhold, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.