author = { McKenna, Elizabeth Perle AND Han, Hahrie },

title = { Groundbreakers how Obama's 2.2 million volunteers transformes campaigning in America },

publisher = {Oxford University Press},

isbn = {9780199394609},

year = {2014},

address = { Oxford [u.a.] },

url = { http://slubdd.de/katalog?TN_libero_mab2 }