Truman Simanjuntak ... [and others]
LIPI Press, 2006
Buku Teks
Bosch, F.D.K.
M. Nijhoff, 1961
Buku Teks
Kelly, Robert L.,author
Wadsworth, 2010
Buku Teks
SPAFA, 1984
Buku Referensi
edited by Mari Pritchard Parker, Elvio Angeloni
McGraw-Hill, 2013
Buku Teks