Developing Inviting SchoolsWilliam W. Purkey, John M. Novak, Joan R. Fretz · First published 2020Open the Tome
Becoming an Invitational LeaderWilliam W. Purkey, Betty L. Siegel · First published 2013Open the Tome
From Conflict to ConciliationPurkey, William W., Sr., John J. Schmidt, John M. Novak · First published 2012Open the Tome
Helping RelationshipArthur W Combs, Donald L Avila, William W Purkey · First published 1978Open the Tome
Helping relationshipsArthur W. Combs, Donald L. Avila, William W. Purkey · First published 1976Open the Tome
The Helping Relationship SourcebookWilliam W., and Avila, Donald L., and Combs, Arthur W. Purkey · First published 1975Open the Tome
