Hasła przedmiotowe: “...Service learning United States....”
Available in Education Source.

Hasła przedmiotowe: “...Education, Higher Aims and objectives United States....”
Digitalia Hispánica

Hasła przedmiotowe: “...Service learning United States....”
Full text available from Education Database: 10/01/2008 to 01/31/2018
Full text available from Research Library: 10/01/2008 to 01/31/2018

Hasła przedmiotowe: “...Education, Higher Social aspects United States Periodicals....”
Full text available from Education Database: 01/01/2013 to 10/31/2016
Full text available from Research Library: 01/01/2013 to 10/31/2016