Dietrich, N. L. (1988). Cost data for landscape construction: Unit prices for site development (8th ed.). Kerr Associates.
Cita Chicago (17th ed.)Dietrich, Norman L. Cost Data for Landscape Construction: Unit Prices for Site Development. 8th ed. Iowa Ames, Iowa: Kerr Associates, 1988.
Cita MLA (9th ed.)Dietrich, Norman L. Cost Data for Landscape Construction: Unit Prices for Site Development. 8th ed. Kerr Associates, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.