Colley, B. C. (1999). Practical manual of land development (3rd ed.). McGraw-Hill.
Cita Chicago (17th ed.)Colley, B. C. Practical Manual of Land Development. 3rd ed. New York: McGraw-Hill, 1999.
Cita MLA (9th ed.)Colley, B. C. Practical Manual of Land Development. 3rd ed. McGraw-Hill, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.