1. Arnquist, I. F., & Roberts, E. H. (1929).The present use of work time of farm homemakers (Bulletin 234). Pullman: Washington State College, Agricultural Experiment Station.
2. Barnett, R. C., & Baruch, G. K. (1987). Determinants of fathers' participation in family work.Journal of Marriage and the Family, 49, 29–40.
3. Belsky, J. (1991). Parental and nonparental child care and children's socioemotional development; A decade in review. In Alan Booth (Ed.)Contemporary families: Looking forward, looking back (pp. 122–140). Minneapolis: National Council on Family Relations.
4. Belsky, J., & Eggebeen, D. (1991). Early and extensive maternal employment and young children's socioeconomic development: Children of the National Longitudional Survey of Youth.Journal of Marriage and the Family, 53, 1083–1098.
5. Bevans, G. E. (1913).How workingmen spend their spare time. Unpublished Ph.D. dissertation, Columbia University, New York, NY.