APA (7th ed.) Citation

Associated Landscape Contractors of America & Thornton, G. (2001). Certified landscape professional study guide: For interior and exterior landscape professionals (3rd ed.). Associated Landscape Contractors of America.

Chicago Style (17th ed.) Citation

Associated Landscape Contractors of America and Gary Thornton. Certified Landscape Professional Study Guide: For Interior and Exterior Landscape Professionals. 3rd ed. [Herndon, Va.]: Associated Landscape Contractors of America, 2001.

MLA (9th ed.) Citation

Associated Landscape Contractors of America and Gary Thornton. Certified Landscape Professional Study Guide: For Interior and Exterior Landscape Professionals. 3rd ed. Associated Landscape Contractors of America, 2001.