William Locke, editor
Springer, 2011
Buku Teks
Kehm, Barbara M.
Wittenberg and Bucharest, 1999
Buku Teks SO
Deane E. Neubauer, editor
Routledge, 2012
Buku Teks
edited by V. Lynn Meek ... [and others]
IAU Press , 1996
Buku Teks SO
edited by Guy Neave, Frans A van Vught
Pergamon Press, 1994
Buku Teks