Hobbs, Lisa
McGraw-Hill, 1967
Buku Teks SO
Spear, Percival
The University of Michigan Press, 1961
Buku Teks
Ministry of Information, 1950
Buku Teks SO
Segal, Ronald
New American Library, 1966
Buku Teks SO
Bagian Publikasi Kementerian Penerangan dan Penjiaran, 1961
Buku Teks SO