Kieso, Donald E., author
Erlangga, 2008
Buku Teks
Morales-Macedo, Fernando
Alphen Aan den Rijn, 1979
Buku Teks
Egbert, Lawrence Deems
Oceana, 1979
Buku Referensi
Williams, Edwin B., author
Holt, Rinehart and Winston, [Date of publication not identified]
Buku Referensi
Walls, Alfonso Vasseur, author
Mexico Diana S.A. 1963
Buku Referensi