APA (7th ed.) Citation

Higgs, E. A., Moncada, S., & Nistico, G. (1993). Nitric oxide: Brain and immune system. Portland Press.

Chicago Style (17th ed.) Citation

Higgs, E. A., S. Moncada, and G. Nistico. Nitric Oxide: Brain and Immune System. London: Portland Press, 1993.

MLA (8th ed.) Citation

Higgs, E. A., et al. Nitric Oxide: Brain and Immune System. Portland Press, 1993.