Pernin, Christopher G; Butler, Dwayne M; Constant, Louay; Geyer, Lily; Long, Duncan; Madden, Dan; Peters, John E; Powers, Jim; S RAND Corporation 2013 Pehmeäkantinen kirja
Troxel, Wendy M; Shih, Regina A; Pedersen, Eric; Geyer, Lily; Fisher, Michael P; Griffin, Beth Ann; Haas, Ann C; Kurz, Jeremy R; RAND Corporation 2015 Pehmeäkantinen kirja