editor, Michael S. Lewis-Beck
Sage Publications, Toppan Publishing, 1993
Buku Referensi
Michael Mario Bramanthyo Adhi, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2023
UI - Skripsi Membership
Dielman, Terry E.
Brooks/Cole, 2004
Multimedia
Hamburg, Morris, author
Harcourt Brace Jovanovich, Pub., 1991
Buku Teks
Diamond, Solomon
Basic Book , 1959
Buku Teks