Stumpf, Samuel Enoch, 1918-1998, author
McGraw-Hill, 1989
Buku Teks
Joos, Irene, author
Reston publishing , 1985
Buku Teks
Cassirer, Ernst, author
Gramedia, 1987
Buku Teks
Modern Pocket Library, 1947
Buku Teks
Brennan, Joseph Gerard, author
Harper & Row, 1967
Buku Teks