When you cite a webpage with APA format, it should follow the format:
Author Last Name, First Initial. (year published, month day). Title of article or page in italics. Site or organization name. URL.
For example, citing this page would be:
Blewett, D. (2021, August 15). Web References. University of Regina. http://www2.cs.uregina.ca/~cs100/lab_schedule/seminar4/web.php
You may find citation generators like the one below helpful: