APA

Labovitz S., Hagedorn R., . (1981). Introduction to social research. New York: McGraw-Hill.

Chicago

Labovitz Sanford, Hagedorn Robert, . 1981. Introduction to social research. New York: McGraw-Hill.

Harvard

Labovitz S., Hagedorn R., . (1981). Introduction to social research. New York: McGraw-Hill.

MLA

Labovitz Sanford, Hagedorn Robert, . Introduction to social research. New York: McGraw-Hill. 1981.