Saya mau tau Psycnet.apa.org dari Krisis paruh baya

Doheny, K.d (n.d.). Midlife Crisis: Depression or Normal Transition?. WebMD - Better information. Better health..

Mid-Life Transition. (n.d.). DrWeil.com - Official Website of Andrew Weil, M.D

Erik H. Erikson, Joan M. Erikson, The Life Cycle Completed: Extended Version (W. W. Norton, 1998)