Não informado. (1988). Differential and integral equations. Ohio University, Department of Mathematics.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Differential and Integral Equations. Athens, Ohio: Ohio University, Department of Mathematics, 1988.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Differential and Integral Equations. Ohio University, Department of Mathematics, 1988.
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