Zdroj: Gestalt Psychology. 1930, p. 150
Wolfgang Köhler: Citáty anglicky
Zdroj: Dynamics in Psychology, 1940, p. 116
Zdroj: Gestalt Psychology. 1930, p. 143; About group formation
Zdroj: Gestalt Psychology. 1930, p. 32
Zdroj: Gestalt Psychology. 1930, p. 137
Zdroj: Gestalt Psychology. 1930, p. 30
Zdroj: The Mentality of Apes, 1925, p. 94; As cited in: Arthur Koestler, The Act of Creation, 1964, p. 103
Zdroj: The Mentality of Apes, 1925, p. 94; As cited in: Arthur Koestler, The Act of Creation, 1964, p. 103
Zdroj: Dynamics in Psychology, 1940, p. 135
Zdroj: Dynamics in Psychology, 1940, p. 55