Please, let us know if any link doesn't work or send us new interesting link Prosím, dajte nám vedieť, ak nejaký linky nefunguje, alebo nám pošlite nový zaujímavý link
Journal, John Wiley & Sons, Inc., Hoboken, USA
Book, John Wiley & Sons, Inc., Hoboken, USA, free summaries, paid full-text chapters
Journal, John Wiley & Sons, Inc., Hoboken, USA, free abstracts, paid full-text articles
Book, A. W. Burgess, National Academy Press, Washington, USA, 1999
Healthcommunities.com, Inc., Northampton, USA
Mayo Clinic, Rochester, MN, USA
Journal, John Wiley & Sons, Inc., Hoboken, USA, free summaries, paid full-text chapters
P. W. Long, Internet Mental Health, last update 2011