1. Alegria, M. A., Robles, R. R., & Vera, M. (1987).The relationship between religion and family planning. Paper presented at the American Public Health Association Annual Meeting, New Orleans.
2. Becerra, R., & Fielder, E. (1985, November). Adolescent attitudes and behavior.Institute for Social Research Quarterly, 1(2), 4?7.
3. Billy, J. O. G., & Udry, J. R. (1984). Adolescent sexual behavior and friendship choice.Social Forces, 62, 653?678.
4. NIH Publication No. 81-2077;G. Cvetkovich,1980
5. Caldwell, S. (1980). Life course perspectives on adolescent parenthood research.Journal of Social Issues, 36, 130?144.