APA (7th ed.) Citation

Trowsdale, J., Ragoussis, I., & Campbell, R. (1991). Map of the human MHC.

Chicago Style (17th ed.) Citation

Trowsdale, J., I. Ragoussis, and R. Campbell. Map of the Human MHC. 1991.

MLA (9th ed.) Citation

Trowsdale, J., et al. Map of the Human MHC. 1991.