Martin, T. (1996). <As >zebras são pretas e brancas porquê? Civilização.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিMartin, Terry. <As >zebras são Pretas E Brancas Porquê? Civilização, 1996.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিMartin, Terry. <As >zebras são Pretas E Brancas Porquê? Civilização, 1996.
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