From one of the links:

"Much folklore exists on how to get rid of moles. But there is little evidence that flooding; putting chewing gum, castor oil or dog hair in the holes; firebombing; or ultrasonic pest repellents actually work. Be careful not to create a larger problem for your yard than the moles present. After all, moles will aerate your soil, add organic matter to your garden and kill unwanted and harmful grubs before moving on."

And from another:

"Wondering how to get rid of moles? There is no magic spray or device that you can use to make them go away. Some people try to sell predator urine, such as coyote or fox urine to get rid of moles, but that doesn't work. They also try to sell ultrasonic sound emitters. These devices are worthless at eliminating moles. Some old wive's tales recommend the use of mothballs or ammonia-soaked rags to make them leave, but I've been to countless homes where these techniques failed - biologists know that these attempts won't work. The ONE AND ONLY WAY to take care of your problem is with trapping and removal of the animals. If you need to find a professional trapper in your hometown, just click our comprehensive list of hundreds of wildlife removal professionals, and you can have your problem quickly taken care of!"