MLA

Ringvold, Amund, Erik Juel, and Sigmund Blika. High Prevalence of Kell Positive Blood Group In the Hitra Population. Trondheim: Tapir, 1993.

APA

Ringvold, A., Juel, E., & Blika, S. (1993). High prevalence of Kell positive blood group in the Hitra population. Trondheim: Tapir.

Chicago

Ringvold, Amund, Erik Juel, and Sigmund Blika. High Prevalence of Kell Positive Blood Group In the Hitra Population. Trondheim: Tapir, 1993.