edited by: John Halligan and Chris Paris
Longman Chesire, 1984
Buku Teks SO
Meinar Dewi Pujansari
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1999
UI - Skripsi Membership
Schwarze, Tilman
Palgrave Macmillan Cham, 2023
eBooks
Abrahamson, Mark
Prentice-Hall, 1980
Buku Teks SO
Gans, Herbert J.
Free Press, 1982
Buku Teks