TUBBS, S. L. (1984). A Systems Approach To Small Group Interaction Stewart L. Tubbs. Newbery Award Records Inc.
Lua i Stíl Chicago (17ú heag.)TUBBS, Stewart L. A Systems Approach To Small Group Interaction Stewart L. Tubbs. Newbery Award Records Inc, 1984.
Lua MLA (8ú heag.)TUBBS, Stewart L. A Systems Approach To Small Group Interaction Stewart L. Tubbs. Newbery Award Records Inc, 1984.
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