Léon, P. (1983). As hesitações do crescimento. João Sá da Costa.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিLéon, Pierre. As Hesitações Do Crescimento. João Sá da Costa, 1983.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিLéon, Pierre. As Hesitações Do Crescimento. João Sá da Costa, 1983.
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