Watt, Homer A.
Scott, Foresman, 1932
Buku Teks
Watt, Homer A.
Scott, Foresman, 1932
Buku Teks
Watt, Homer A.
Scott, Foresman and company , 1925
Buku Teks
Dean Curry, genaral series editor
English Language Programs Division, 1988
Buku Referensi
Martinez, Julio A.
Greenwood Press, 1985
Buku Teks