APA (7th ed.) Citation

Sigel, I. E., & Laosa, L. M. (1983). Changing families. Plenum Pr.

Chicago Style (17th ed.) Citation

Sigel, Irving E., and Luis M. Laosa. Changing Families. New York, N. Y. [u.a.]: Plenum Pr, 1983.

MLA (9th ed.) Citation

Sigel, Irving E., and Luis M. Laosa. Changing Families. Plenum Pr, 1983.