Cita APA (7th ed.)

Turner, J. M. (2009). Excavation systems planning, design and safety. McGraw-Hill.

Cita Chicago (17th ed.)

Turner, Joe M. Excavation Systems Planning, Design and Safety. New York: McGraw-Hill, 2009.

Cita MLA (8th ed.)

Turner, Joe M. Excavation Systems Planning, Design and Safety. McGraw-Hill, 2009.