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Prentice-Hall, 1966
Buku Teks
Orilia, Lawrence S., author
McGraw-Hill, 1982
Buku Teks
Fakultas Ilmu Komputer Universitas Indonesia, 1997
UI - Skripsi (Membership)
Pierson, Lillian, author
John Wiley & Sons, 2017
Buku Teks
Gildersleeve, Thomas R., author
Prentice-Hall, 1971
Buku Teks