Buku Teks
Stutterheim, Willem Frederik, 1892-1942
[Publisher not identified], 1987
Buku Teks
[Publisher not identified], [Date of publication not identified]
Naskah
Ministry of Communication and Information Technology
Ministry of Communication and Information Technology, 2014
Buku Teks SO
Clarke, Marcus
Hale & Iremonger, c1983
Buku Teks SO