Teguh Pudjo Muljono
BPFE-Yogyakarta , 1996
Buku Teks
Edey, Harold C.
Hutchinson's University Library , 1972
Buku Teks
Williangton, C. Oliver
D. Van Nostrand Co., 1956
Buku Teks
Wellington, C. Oliver
van Nostrand, Comp., Inc , 1960
Buku Teks
Wixon, Rufus
Alexander Hamilton Institute , 1961
Buku Teks