Page, R., Clarke, R., & Poole, J. (1982). Problem solving. Oliver & Boyd in association with the National Centre for School Technology.
Citazione stile Chigago Style (17a edizione)Page, Ray, Roland Clarke, e John Poole. Problem Solving. Edinburgh: Oliver & Boyd in association with the National Centre for School Technology, 1982.
Citatione MLA (8a ed.)Page, Ray, et al. Problem Solving. Oliver & Boyd in association with the National Centre for School Technology, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.