Tubbs, Stewart L. A systems approach to small group interaction Stewart L. Tubbs. - 3rd ed. - New York Random House c1988. - xi, 402 p. :ication ects. ISBN: 0394365399 16.00 LCCN: 87023394 LC Class. No.: HD66 / .T82 1988 Dewey Class. No.: 302.3/4