Axelrod, Herbert R., editor
Mcgraw-Hill, 1955
Buku Referensi
Rihastiwi Setiya Murti, author
Balai Besar Kulit, Karet, dan Plastik, 2016
Artikel Jurnal
Eddelson, Michael, author
Oxford University Press, 1999
Buku Referensi
Kuiter, Rudie H., author
Gramedia, 1992
Buku Referensi
Ford Foundation, [date of publication not identified]
Buku Teks