Programming for parks, recreation, and leisure servicesDonald G. DeGraaf · First published 1999 · Latest edition 2010Open the Tome
Leisure and life satisfactionChristopher R. Edginton, Donald DeGraaf, Rodney B. Dieser, Susan R Edginton · First published 2001 · Latest edition 2005Open the Tome
Programming for parks, recreation, and leisure servicesDebra J. Jordan, Donald G. Degraaf, Kathy H. Degraaf · First published 2005Open the Tome
