Springer, J. F. (1969). A Brazilian factory study 1966: Working class conditions and attitudes during a political economic crisis. Presentation: Charles Wagley. Centro Intercultural de Documentacion.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিSpringer, Joseph Frank. A Brazilian Factory Study 1966: Working Class Conditions and Attitudes During a Political Economic Crisis. Presentation: Charles Wagley. Cuernavaca: Centro Intercultural de Documentacion, 1969.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিSpringer, Joseph Frank. A Brazilian Factory Study 1966: Working Class Conditions and Attitudes During a Political Economic Crisis. Presentation: Charles Wagley. Centro Intercultural de Documentacion, 1969.
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