Barber, Antony
Elsevier, 1992
Buku Teks
William Kaufmann, 1982
Buku Teks
Luekenotte
EGC, 1997
Buku Teks
edited by Simon P. Anderson, Joel Waldfogel, David Strömberg
Elsevier, 2016
Buku Referensi
Metcalf, Richard W., author
Harcourt Brace Jovanovich, 1990
Buku Teks