May, Lola June
The Free Press, 1970
Buku Teks
Ben-Chai, David, author
Sense, 2012
eBooks
Phares Odaffer, Randall Charles, Thomas Cooney, John Dossey, Jane Schielack
Pearson Addison Wesley, 2008
Buku Teks
Garstens, Helen L., author
Macmillan, 1969
Buku Teks
Renner, John W., author
Harper & Row, 1968
Buku Teks