APA (7th ed.) Citation

Beijdorff, A. F. (1979). Energy efficiency. Shell Internat. Petroleum Co.

Chicago Style (17th ed.) Citation

Beijdorff, A. F. Energy Efficiency. London: Shell Internat. Petroleum Co, 1979.

MLA (9th ed.) Citation

Beijdorff, A. F. Energy Efficiency. Shell Internat. Petroleum Co, 1979.

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