Mongait, Alexander, author
Foreign Languages Publishing House, 1959
Buku Teks
Kelly, Robert L.,author
Wadsworth, 2010
Buku Teks
SPAFA, 1984
Buku Referensi
edited by Mari Pritchard Parker, Elvio Angeloni
McGraw-Hill, 2013
Buku Teks
Rothstein, Andrew, author
Penguin Books , 1950
Buku Teks