Chartrand, Gary, author
McGraw-Hill, 2005
Buku Teks
Balakrishnan, R., author
[Springer Science, ], 2012
eBooks
Brandstadt, Andreas, author
Society for Industrial and Applied Mathematics, 1999
eBooks
Gross, Jonathan L., author
Chapman & Hall/CRC Taylor & Francis Group, 2006
Buku Teks
Universitas Indonesia, 1989
UI - Skripsi (Membership)