APA

Merrill F. E., . (1950). Social problems. New York: Knopf.

Chicago

Merrill Francis Ellsworth, . 1950. Social problems. New York: Knopf.

Harvard

Merrill F. E., . (1950). Social problems. New York: Knopf.

MLA

Merrill Francis Ellsworth, . Social problems. New York: Knopf. 1950.