Write the author's name of the problem, if any. Place a period after it.
Write the name of the problem in quotation marks, such as "Finding the Side of the Box." Place a period after the last letter in the name, before the second quotation mark.
Write the name of the school, Internet site or journal where the problem was found. Place it in italics and place a period after it.
Write the date the source was created, with the day followed by the month and then year, if this information is available.
Place the website's URL inside greater than and less than signs, < and >. Place a period after the last > sign.
Check over the final source, it should look like this: Author. "Name of Problem." Publishing Company. <http://www.mathsource.com>.