Hamdy, R., Lewis, J., Copeland, R., Depelteau, A., Kinser, A., Kendall-Wilson, T., & Whalen, K. (1969). Repetitive Questioning Exasperates Caregivers. Gerontology & Geriatric Medicine, 4, 2333721417738915. https://doi.org/10.1177/2333721417738915 (Original work published 1969)