Anna Marietta da Silva, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2021
Artikel Jurnal
Schiffman, Harold F., author
Routledge, 1996
Buku Teks
Sandler, Wendy, author
Cambridge University Press, 2006
Buku Teks
edited by Ralph Ludwig, Peter Mühlhäusler and Steve Pagel
Cambridge University Press, 2019
Buku Teks
Ledgrad, Henry, author
Science Research Association, 1981
Buku Teks