.Warren, R. H. (1989). Motivation and productivity in the construction industry. Van Nostrand Reinhold.
Citazione stile Chigago Style (17a edizione).Warren, Robert H. Motivation and Productivity in the Construction Industry. New York: Van Nostrand Reinhold, 1989.
Citatione MLA (9a ed.).Warren, Robert H. Motivation and Productivity in the Construction Industry. Van Nostrand Reinhold, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.