APA (7e ed.) Bronvermelding

Fries, J. F. (1989). Aging well: A guide for successful seniors. Addison-Wesley.

Chicago (17e ed.) Bronvermelding

Fries, James F. Aging Well: A Guide for Successful Seniors. Reading, MA: Addison-Wesley, 1989.

MLA (9e ed.) Bronvermelding

Fries, James F. Aging Well: A Guide for Successful Seniors. Addison-Wesley, 1989.