APA

McCahan D., . (1950). Life insurance trends at mid-century. Philadelphia: University of Pennsylvania Press.

Chicago

McCahan David, . 1950. Life insurance trends at mid-century. Philadelphia: University of Pennsylvania Press.

Harvard

McCahan D., . (1950). Life insurance trends at mid-century. Philadelphia: University of Pennsylvania Press.

MLA

McCahan David, . Life insurance trends at mid-century. Philadelphia: University of Pennsylvania Press. 1950.