APA (7 ম সংস্করণ) উদ্ধৃতি

Howarth, S. (1997). A century in oil: The "Shell" Transport and Trading Company 1897-1997. Weidenfeld & Nicolson.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Howarth, Stephen. A Century in Oil: The "Shell" Transport and Trading Company 1897-1997. London: Weidenfeld & Nicolson, 1997.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Howarth, Stephen. A Century in Oil: The "Shell" Transport and Trading Company 1897-1997. Weidenfeld & Nicolson, 1997.