L. Tubbs Stewart. (2007). A Stystems Approach to small Group Interaction (Tái bản lần thứ 9.). American: MC Graw Hill.
শিকাগো স্টাইলে সাইটেশনL. Tubbs Stewart. A Stystems Approach to Small Group Interaction. Tái bản lần thứ 9. American: MC Graw Hill, 2007.
এমএলএ সাইটেশনL. Tubbs Stewart. A Stystems Approach to Small Group Interaction. Tái bản lần thứ 9. American: MC Graw Hill, 2007.
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