APA

(1981). Contemporary social research series. London [u.a.]: Allen & Unwin.

Chicago

1981. Contemporary social research series. London [u.a.]: Allen & Unwin.

Harvard

(1981). Contemporary social research series. London [u.a.]: Allen & Unwin.

MLA

Contemporary social research series. London [u.a.]: Allen & Unwin. 1981.