Tappe, M. K., Duda, J. L., & Menges-Ehrnwald, P. (1989). Perceived barriers to exercise among adolescents. [s.n.].
Chicago Style (17th ed.) CitationTappe, Marlene K., Joan L. Duda, and Patricia Menges-Ehrnwald. Perceived Barriers to Exercise Among Adolescents. [S.l.]: [s.n.], 1989.
MLA (9th ed.) CitationTappe, Marlene K., et al. Perceived Barriers to Exercise Among Adolescents. [s.n.], 1989.
Warning: These citations may not always be 100% accurate.