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