To cite package ‘macrophage’ in publications use:

  Alasoo, K., Rodrigues, J., Mukhopadhyay, S. et al. Shared genetic
  effects on chromatin and gene expression indicate a role for enhancer
  priming in immune response. Nature Genetics. 50(3):424-431 (2018).

A BibTeX entry for LaTeX users is

  @Article{,
    author = {{Alasoo} and {Kaur} and {Rodrigues} and {Julia} and {Mukhopadhyay} and {Subhankar} and {Knights} and Andrew J. and {Mann} and Alice L. and {Kundu} and {Kousik} and {Hale} and Christineand Dougan and {Gordon} and {Gaffney} and Daniel J. and {Consortium} and H. I. P. S. C. I.},
    title = {Shared genetic effects on chromatin and gene expression indicate a role for enhancer priming in immune response},
    journal = {Nature Genetics},
    year = {2018},
    volume = {50},
    number = {3},
    pages = {424-431},
    url = {https://doi.org/10.1038/s41588-018-0046-7},
  }