APA-viite

Singer, E. (1954). Personality in handwriting: The guiding image in graphology. Duckworth.

Chicago-tyylinen lähdeviittaus

Singer, Eric. Personality in Handwriting: The Guiding Image in Graphology. London: Duckworth, 1954.

MLA-viite

Singer, Eric. Personality in Handwriting: The Guiding Image in Graphology. Duckworth, 1954.