Yeats, William Butler
Everyman's Library, 1992
Buku Referensi
Keats, John
Everyman's Library, 1999
Buku Teks SO
Cosbuc, George
Minerva, 1980
Buku Teks SO
Berg, Pierre
American Management Association;, 2008
eBooks
Wheeler, Ella
A Wico Book, 2015
Buku Teks SO