APA

Sjoberg G., Nett R., . (1968). A methodology for social research. New York: Harper & Row.

Chicago

Sjoberg Gideon, Nett Roger, . 1968. A methodology for social research. New York: Harper & Row.

Harvard

Sjoberg G., Nett R., . (1968). A methodology for social research. New York: Harper & Row.

MLA

Sjoberg Gideon, Nett Roger, . A methodology for social research. New York: Harper & Row. 1968.