The Press of Case Western Reserve University, 1972
Buku Teks
The Press of Case Western Reserve University, 1973
Buku Teks
Berkeley : The University of California
Majalah, Jurnal, Buletin
Spacks, Patricia Meyer, author
Wiley-Blackwell, 2009
Buku Teks
Anderson, M.S., author
Longman, 1971
Buku Teks