Mayor, Federico
UNESCO, 1999
Buku Teks
Gieryn, Thomas F., author
The University of Chicago Press, 1999
Buku Teks
Martinez, Susan B., author
Bear Company , 2015
Buku Teks
Radder, Hans
Springer, 2012
eBooks
Whitehead, Alfred North, 1861-1947, author
Philosophical Library, 1948
Buku Teks