Singer, E. (1954). Personality in handwriting: The guiding image in graphology. Duckworth.
शिकागो स्टाइल उद्धरणSinger, Eric. Personality in Handwriting: The Guiding Image in Graphology. London: Duckworth, 1954.
एमएलए उद्धरणSinger, Eric. Personality in Handwriting: The Guiding Image in Graphology. Duckworth, 1954.
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