Waung, W.S.K.
Heinemann Educational, 1971
Buku Teks
Wang, Chang-ling
Kwang Lu Publishing Service, 1984
Buku Teks
Schwartz, Harry, author
Atheneum, 1965
Buku Teks
Schwartz, Harry, author
Atheneum, 1966
Buku Teks
Schwartz, Harry, author
Atheneum, 1966
Buku Teks