Sandra Ratcliff Daffron

发表

Edward Webster, Aj Barse, Sandra Ratcliff Daffron, 2009 .

Sandra Ratcliff Daffron, Mary Wehby North, 2006 .

Sandra Ratcliff Daffron, Rosemary S. Caffarella, R. Caffarella, 1994 .

Sandra Ratcliff Daffron, Rosemary S. Caffarella, R. Caffarella, 2011 .