Tetrapyrroles
  MLA
  Warren, Martin; Smith, Alison, et al. Tetrapyrroles. Springer New York, 2009.
  APA
  Warren, A., Smith, A. G, Warren, M. J, & Smith, A. (2009). Tetrapyrroles. Springer New York.
  Chicago
  Warren, Martin; Smith, Alison, Alison G Smith, Martin J Warren, and Alison Smith. Tetrapyrroles. : Springer New York, 2009.