Brown, Joe David
Time Incorporated, 1961
Buku Teks SO
Publication Division, Ministry of Information and Broadcasting, 1954
Buku Teks SO
Hobbs, Lisa
McGraw-Hill, 1967
Buku Teks SO
Ministry of Information, 1950
Buku Teks SO
Bagian Publikasi Kementerian Penerangan dan Penjiaran, 1961
Buku Teks SO