Nitamia Indah Cantika, author
Fakultas Teknik Universitas Indonesia, 2013
UI - Skripsi (Membership)
Barcus, Holly R., author
Routledge, 2018
Buku Teks
Knapp, Brian, author
Longman House, 1992
Buku Teks
Lebon, J. H. G., author
Hutchinson University Library, 1969
Buku Teks
Huntington, Ellsworth, author
John Wiley & Sons, 1951
Buku Teks