Hanover Pub.,, 1981
Buku Referensi
Bernstein, Lewis
Norwalk Appletton century crofts , 1985
Buku Teks
Fell-Carlson, Deborah L.
Thomson/Delmar Learning, 2008
Buku Teks
Dong-Kyun Park
ESCAP, 2017
Artikel Jurnal
Susiana Nugraha
Universitas Indonesia, 2017
Artikel Jurnal