APA (7th ed.) Citation

Norman, D., & Sibbick, J. (1990). When dinosaurs ruled the earth. Marshall Cavendish Books Limited.

Chicago Style (17th ed.) Citation

Norman, David, and John Sibbick. When Dinosaurs Ruled the Earth. London: Marshall Cavendish Books Limited, 1990.

MLA (9th ed.) Citation

Norman, David, and John Sibbick. When Dinosaurs Ruled the Earth. Marshall Cavendish Books Limited, 1990.

Warning: These citations may not always be 100% accurate.