Leigh, D. (2006). The group trainer's handbook: Designing and delivering training for groups (Third edition.). Kogan Page.
Citazione stile Chigago Style (17a edizione)Leigh, David. The Group Trainer's Handbook: Designing and Delivering Training for Groups. Third edition. London ; Philadelphia: Kogan Page, 2006.
Citatione MLA (8a ed.)Leigh, David. The Group Trainer's Handbook: Designing and Delivering Training for Groups. Third edition. Kogan Page, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.