Did I cite the start my source correctely according to APA format. The source did not have a date or an author listed.
WebMD (n.d.) Attention Deficit Hyperactivity Disorder: What Is ADHD?
Nonperiodical Web Document, Web Page, or Report
List as much of the following information as possible (you sometimes have to hunt around to find the information; don't be lazy. If there is a page like http://www.somesite.com/somepage.htm, and somepage.htm doesn't have the information you're looking for, move up the URL to http://www.somesite.com/):
Author, A. A., & Author, B. B. (Date of publication). Title of document. Retrieved from http://Web address
Angeli, E., Wagner, J., Lawrick, E., Moore, K., Anderson, M., Soderland, L., & Brizee, A. (2010, May 5). General format. Retrieved from http://owl.english.purdue.edu/owl/resource/560/01/
NOTE: When an Internet document is more than one Web page, provide a URL that links to the home page or entry page for the document. Also, if there isn't a date available for the document use (n.d.) for no date.
http://owl.english.purdue.edu/owl/resource/560/10/
from http://owl.english.purdue.edu/owl/resource/560/01/
Do you see what is missing in your citation?
According to APA format, when you have a source that does not have a date or an author listed, you should use the abbreviation "n.d." for "no date" in place of the publication year.
So, in your citation of the WebMD article, you correctly used (n.d.) after the name of the source. However, you should also include the title of the specific page or article in sentence case (capitalizing only the first word and any proper nouns), followed by a period after the title.
Here's the corrected citation according to APA format:
WebMD. (n.d.). Attention Deficit Hyperactivity Disorder: What Is ADHD?