BibTex format
@techreport{Speirs:2017,
author = {Speirs, J and Balcombe, P and Johnson, E and Martin, J and Brandon, N and Hawkes, A},
booktitle = {A greener gas grid: what are the options?},
title = {A Greener Gas Grid: What Are the Options?},
url = {https://www.sustainablegasinstitute.org/wp-content/uploads/2017/12/SGI-A-greener-gas-grid-what-are-the-options-WP3.pdf},
year = {2017}
}