APA (7th ed.) Citation

Day, K., & Marsh, K. (1991). Naturally acquired immunity to Plasmodium falciparum.

Chicago Style (17th ed.) Citation

Day, K., and K. Marsh. Naturally Acquired Immunity to Plasmodium Falciparum. 1991.

MLA (9th ed.) Citation

Day, K., and K. Marsh. Naturally Acquired Immunity to Plasmodium Falciparum. 1991.

Warning: These citations may not always be 100% accurate.