You and your adolescent :
a parent's guide for ages 10 to 20 /
Laurence Steinberg and Ann Levine.

APA Citation

Steinberg, L. D., Levine, A. (1991). You and your adolescent: a parent's guide for ages 10 to 20. 1st HarperPerennial ed. New York: HarperPerennial.

MLA Citation

Steinberg, Laurence D., 1952-, and Ann Levine. You And Your Adolescent: a Parent's Guide for Ages 10 to 20. 1st HarperPerennial ed. New York: HarperPerennial, 1991.

Warning: These citations may not always be complete (especially for serials).