Bassis, Michael S., author
McGraw-Hill, 1991
Buku Teks
Roucek, Joseph S., author
Littlefield, Adam, 1963
Buku Teks
Goodyear Publishing, 1972
Buku Teks
edited by Talcott Parsons
Voice of American, 1968
Buku Teks
Roucek, Joseph S., author
Bina Aksara, 1984
Buku Teks