Uren, Lester C.
New York: McGraw-Hill, 1950
Buku Teks
Uren, Lester C.
New York: McGraw-Hill, 1956
Buku Teks
Bugi Umar Seno Aji, author
Universitas Indonesia, 1999
UI - Tesis (Membership)
Universitas Indonesia, 2012
UI - Skripsi (Open)
Stanvac Indonesia, 1970
Buku Teks