Patton, David L., and Robert Earl Lloyd. “Asymmetrical Learning of Locations on Maps: Implicit Learning, Prior Knowledge and Sex Differences”. Cartographic Perspectives, no. 63 (June 1, 2009): 20–50. Accessed May 6, 2024. https://cartographicperspectives.org/index.php/journal/article/view/cp63-patton-lloyd.