You need to provide the following to Mr. Moeller:
Internship Coordinator, Laura Groth, will use the writing sample and the letter of recommendation in securing your internship. Please inform the writer that the point of the letter is not to get you admitted to the program but to talk about what you would bring to an internship.
If you want to contact Laura Groth, you may reach her using the following contact information:
Phone: 703-525-LCWC (or 703-525-5292) or 888-456-LCWC
Post: 1025 Arlington Boulevard, Arlington, VA 22209-2225
Link here for more application info: http://washingtonsemester.org/admissions/forms/