Grant, Stan
Jamaica: Courier Press, 1973
Buku Teks
Hardisty, David
Oxford Oxford University Press 1989
Buku Teks
Hardisty, David, author
Oxford University Press, 1989
Buku Teks
Murdock, George Peter, author
McGraw-Hill, 1959
Buku Teks
Murdock, George Peter, author
McGraw-Hill, 1959
Buku Teks