Cita APA

Howarth, S. (2007). A history of Royal Dutch Shell: 2 Powering the hydrocarbon revolution, 1939 - 1973. A history of Royal Dutch Shell.

Citación estilo Chicago

Howarth, Stephen. "A History of Royal Dutch Shell: 2 Powering the Hydrocarbon Revolution, 1939 - 1973." A History of Royal Dutch Shell 2007.

Cita MLA

Howarth, Stephen. "A History of Royal Dutch Shell: 2 Powering the Hydrocarbon Revolution, 1939 - 1973." A History of Royal Dutch Shell, 2007.