APA (7th ed.) Citation

Holmen, A., Jens, K. J., & Kolboe, S. (1991). Natural gas Conversion Symposium: Natural gas conversion. Elsevier.

Chicago Style (17th ed.) Citation

Holmen, A., K. J. Jens, and S. Kolboe. Natural Gas Conversion Symposium: Natural Gas Conversion. Amsterdam: Elsevier, 1991.

MLA (8th ed.) Citation

Holmen, A., et al. Natural Gas Conversion Symposium: Natural Gas Conversion. Elsevier, 1991.