APA

Harper A. C., . (1986). The health of populations: an introduction. New York: Springer Pub. Co.

Chicago

Harper Andrew C, . 1986. The health of populations: an introduction. New York: Springer Pub. Co.

Harvard

Harper A. C., . (1986). The health of populations: an introduction. New York: Springer Pub. Co.

MLA

Harper Andrew C, . The health of populations: an introduction. New York: Springer Pub. Co. 1986.