William J. Sefick

Counting blessings in early adolescents: an experimental study of gratitude and subjective well-being.

Robert A Emmons, Jeffrey J. Froh, Robert A. Emmons, 2008, Journal of school psychology.

Comparison of Automated and Standard Administration of the Purdue Pegboard with Mentally Retarded Adults

William J. Sefick, V. Guarnaccia, Lawrence K. Daniels, 1975, Perceptual and motor skills.

Counting blessings in early adolescents: an experimental study of gratitude and subjective well-being.

Robert A Emmons, Jeffrey J. Froh, William J. Sefick, 2008, Journal of school psychology.