Sobary, M. (1999). Piety and Economics Behavior A Study of The Informal Sector in Surabya, West Java = Kesalehan dan Tingkah Laku Ekonomi. Yayasan Bentang Budaya.
استشهاد بنمط شيكاغوSobary, Mohamad. Piety and Economics Behavior A Study of The Informal Sector in Surabya, West Java = Kesalehan Dan Tingkah Laku Ekonomi. Yayasan Bentang Budaya, 1999.
MLA استشهادSobary, Mohamad. Piety and Economics Behavior A Study of The Informal Sector in Surabya, West Java = Kesalehan Dan Tingkah Laku Ekonomi. Yayasan Bentang Budaya, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.