APA

Middleman R. R., . (1968). The non-verbal method in working with groups. New York: Association Press.

Chicago

Middleman Ruth R, . 1968. The non-verbal method in working with groups. New York: Association Press.

Harvard

Middleman R. R., . (1968). The non-verbal method in working with groups. New York: Association Press.

MLA

Middleman Ruth R, . The non-verbal method in working with groups. New York: Association Press. 1968.