Cita APA (7th ed.)
Whitehead, W. L. (1949). Oil Property Valuation.
Cita Chicago (17th ed.)
Whitehead, Walter Lucius. Oil Property Valuation. 1949.
Cita MLA (9th ed.)
Whitehead, Walter Lucius. Oil Property Valuation. 1949.
Atenció: Aquestes cites poden no estar 100% correctes.