Link, Peter K.
Oil & Gas Consultants International, 1982
Buku Teks
Levorsen, A.I.
San Fransisco: W.H. Freeman, 1967
Buku Teks
Selley, Richard C.
Academic Press, 1998
Buku Teks
Brenner, Robert L., author
International Human Resources Development Corp, 1984
Buku Teks
edited by M.L. Bordenave
Editins Technip, 1993
Buku Teks