APA (7e ed.) Bronvermelding

Sullican, G. (2018). Retirement fail: The 9 reasons people flunk post work life.. John Wiley & Sons.

Chicago (17e ed.) Bronvermelding

Sullican, Greg. Retirement Fail: The 9 Reasons People Flunk Post Work Life.. New Jersey: John Wiley & Sons, 2018.

MLA (9e ed.) Bronvermelding

Sullican, Greg. Retirement Fail: The 9 Reasons People Flunk Post Work Life.. John Wiley & Sons, 2018.