Basic format
Author, A. A. (Year). Title of page. Webpage. http://xxxxx
1. Author(s). List each author's last name and initials as Author, A. A., Author, B. B., & Author, C. C. If there is no author, spell out the name of the organization or site.
2. (Year, Month Date). Provide as specific a date as is available, but may be only the year. If there is no date use (n.d.).
3. Title of page or section. Italicize the title of the page.
4. Source. Usually the official name of the website. If the source would be the same as the author, you can omit the source to avoid repetition.
5. URL
Webpage on a website with a government agency group author
Centers for Disease Control and Prevention. (2018, August 22). Preventing HPV-associated cancers.
https://www.cdc.gov/cancer/hpv/basic_info/prevention.htm
Webpage on a website with an individual author
Smith, Andrea B. (2000, September 01). Hispanic/Latino. EthnoMed.
https://ethnomed.org/culture/hispanic-latino/
See the APA Style website for more Webpage on a Website References examples.