When citing a web page, include the date you accessed it, and the URL. If the web page lists a date when it was updated, include that before the accessed date.
Author AA. Date. Title. Place of publication: Publisher; [updated date; accessed date]. URL.
Mulhauser G. 2010. An introduction to cognitive therapy & cognitive behavioural approaches. Newton Abbot (UK): CounsellingResource.com; [updated 2010 Nov 2; accessed 2019 Jan 22]. http://counsellingresource.com/types/cognitive-therapy.