Phillips, Charles F.
Boston , Houghton Mifflin
Buku Teks SO
Alex Soemadji Nitisemito
Ghalia Indonesia, 1984
Buku Teks
Alex Soemadji Nitisemito
Ghalia Indonesia, 1984
Buku Teks
Taylor, Weldon Johnson, 1908-
South-Western, 1975
Buku Teks
Parkinson, Cyril Northcote, 1909-1993
Federal Publications, 1992
Buku Teks SO