http://www.pursuit-of-happiness.org/history-of-happiness/abraham-maslow/
https://www.ahpweb.org/index.php?option=com_k2&view=item&layout=item&id=14&Itemid=24
http://www.goodtherapy.org/famous-psychologists/abraham-maslow.html
http://www.simplypsychology.org/humanistic.html
http://www.slideshare.net/RAdamowicz/humanism-3777446
http://www.slideshare.net/claudineaireen/humanism-powerpoint
https://www.ahpweb.org/index.php?option=com_k2&view=item&layout=item&id=14&Itemid=24
http://www.goodtherapy.org/famous-psychologists/abraham-maslow.html
http://www.simplypsychology.org/humanistic.html
http://www.slideshare.net/RAdamowicz/humanism-3777446
http://www.slideshare.net/claudineaireen/humanism-powerpoint