Galdikas, Biruté M.F.; Briggs, Nancy Erickson; Sheeran, Lori K.; Shapiro, Gary L.; Goodall, Jane Springer Science+Business Media 2002 Kovakantinen kirja
Bigelow, James H; Moore, S Craig; Taylor, William W; Williams, William A; McGarvey, Ronald G; Briggs, Gary James; Buryk, Peter; RAND Corporation 2013 Pehmeäkantinen kirja
Bigelow, James H; Moore, S Craig; Taylor, William W; Williams, William A; McGarvey, Ronald G; Briggs, Gary James; Buryk, Peter; RAND Corporation 2013 Pehmeäkantinen kirja
Galdikas, Biruté M.F.; Briggs, Nancy Erickson; Sheeran, Lori K.; Shapiro, Gary L.; Goodall, Jane Springer-Verlag New York Inc. 2013 Pehmeäkantinen kirja