King, Martin Luther
The Trumpet of Conscience / Martin Luther King
Harper & Row Publhers, 1968
 Buku Teks SO
Hardy, Thomas, 1840-1928
The trumpet-major and Robert his brother
Macmillan, 1952
 Buku Teks SO
Buckley-Archer, Linda
Gideon the cutpurse : para penjelajah waktu
Mizan , 2009
 Buku Teks SO
Labarge, Margaret Wade
Small sound of the trumpet: women in medieval life
Beason Press, 1986
 Buku Teks SO
Teddy Nurcahyawan
Proses hukum yang wajar, studi kasus "Gideon"
1999
 Artikel Jurnal