edited by Tarquam McKenna, Marcelle Cacciattolo, Mark Vicars
Cambridge University Press, 2013
Buku Teks
edited Judith Aron Rubin
Bunner-routletge, 2001
Buku Teks SO
Schaefer, Charles E.
Guilford Press, 2016
Buku Teks SO
compiled by Tig Thomas
Miles Kelly, 2008
Buku Teks SO
Baden-Powell, Robert
Oxford University Press, 2005
Buku Teks SO