$1!@B'An!=x!KH':`!4x!KHs - Lewin, Kurt; $1'<v'JE!JY(B.$1!42-HEs; $1!a\'X0!BSs ($1!4I!0a (B: s $1!4I!0a!9%':`!3K!JH!Na(B,s, 2011)
Keywords: Gestalt psychology