Clancy, Tom
Berkeley Books, 1996
Buku Teks
Allen, Carleton Kemp, Sir
Stevens & Sons Limited, 1956
Buku Teks
Allen, Carleton Kemp, Sir
Stevens & Sons Limited, 1954
Buku Teks
Dashefsky, H.S., author
Burgess, 1977
Buku Teks
Muchammad Zaidun, author
United Nations Development Programme (UNDP), 2009
Buku Teks