Purba, Gordiston
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2023
UI - Skripsi (Membership)
Jackson, John Brinckerhoff, 1909-
Yale University Press, 1994
Buku Teks
Routledge, 2020
eBooks
Routledge, 2020
eBooks
Matthews, M.H.
Barnes & Noble Books, 1992
Buku Teks