1
by Entwisle, Barbara
Published 2005
National Academies Press

2
by John Leigh Walters
Published 2009
Athabasca University Press

3
by Oliva Medina, Mario
Published 2020
Editorial Universidad Nacional (EUNA)

4
by Helen Waldstein Wilkes
Published 2010
Athabasca University Press

5
by Farideh Goldin
Published 2015
Athabasca University Press