Keir, David Lindsay, author
Adam and Charles Black, 1946
Buku Teks
Keir, David Lindsay, author
Adam and Charles Black, 1961
Buku Teks
Richards, Denis, author
Longman, Green, 1952
Buku Teks
Peacock, H.L., author
Heinemann Educational Books, 1980
Buku Teks
Wasson, Ellis, author
Wiley-Blackwell, 2010
Buku Teks