521. | | Autor: Collins, Darrian Coautor: ; Tisdell, Clem | |
522. | | Autor: Davies, Brian | |
523. | | Autor: Nash, Robert | |
524. | | Autor: Pike, Steven | |
525. | | Autor: Bowen, David Coautor: ; Clarke, Jackie | |
526. | | Autor: Seaton, A. V | |
527. | | Autor: Naylor, Gillian Coautor: ; Kleiser, Susan Bardi | |
528. | | Autor: Gilbert, David Coautor: ; Abdullah, Junaida | |
529. | | Autor: Thomas, David F. | |
530. | | Autor: Cialdini, Robert B. Coautor: ; Goldstein, Noah J. | |