Harary, Frank
Addison-Wesley , 1994
Buku Teks
Yuwen, Li, author
China Renmin University Press, 2012
eBooks
Arrow, Kenneth J., author
John Wiley & Sons, 1951
Buku Teks
Brady, Emily, editor
Springer, 2012
eBooks
Rokeach, Milton
Jossey-Bass Publishers, 1980
Buku Teks