@BOOK{NAP9887, author = "National Research Council", title = "Letter Report on the Youth Attitude Tracking Study (YATS)", doi = "10.17226/9887", url = "https://nap.nationalacademies.org/catalog/9887/letter-report-on-the-youth-attitude-tracking-study-yats", year = 2000, publisher = "The National Academies Press", address = "Washington, DC" }