Hershey, Douglas A.; Jacobs-Lawson, Joy M.; McArdle, John J.; Hamagami, Fumiaki (2007). "Psychological Foundations of Financial Planning for Retirement". Journal of Adult Development. 14 (1–2): 26–36. doi:10.1007/s10804-007-9028-1. S2CID143157387.
Hershey, Douglas A.; Jacobs-Lawson, Joy M.; McArdle, John J.; Hamagami, Fumiaki (2007). "Psychological Foundations of Financial Planning for Retirement". Journal of Adult Development. 14 (1–2): 26–36. doi:10.1007/s10804-007-9028-1. S2CID143157387.