International Petroleum encyclopedia 1990
editor, John C. McCaslin
PennWell Publishing , 1990
 Buku Referensi
International petroleum encyclopedia 1996
editor Jim West
PennWell Pub. Co., 1998
 Buku Referensi
Johnston, Daniel
International petroleum fiscal system and production sharing contracts
Penwell Books, 1994
 Buku Teks
Adelman, M.A., author
The world petroleum market
Johns Hopkins University Press, 1972
 Buku Teks
Frankel, P.H., author
Essentials of petroleum : a key to oil economics
Chapman and Hall, 1946
 Buku Teks
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