Perkins, John, author
Berrett-Kochler, 2004
Buku Teks
Perkins, John, author
Abdi Tandur, 2005
Buku Teks
Perkins, John, author
Abdi Tandur, 2005
Buku Teks
Perkins, John, author
Berrett-Koehler Publishers, 2016
Buku Teks
Rousseau, Jean-Jacques, 1712-1778, author
Everyman`s Library, 1992
Buku Teks