Barnhill, R. E., Boehm, W., & Hoschek, J. (1983). Surfaces in computer aided geometric design: Proceedings of a conference held at Mathematisches Forschungsinstitut Oberwolfach, F.R.G., April 25-30, 1982. North-Holland Pub. Co. ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co..
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিBarnhill, Robert E., Wolfgang Boehm, এবং Josef Hoschek. Surfaces in Computer Aided Geometric Design: Proceedings of a Conference Held at Mathematisches Forschungsinstitut Oberwolfach, F.R.G., April 25-30, 1982. Amsterdam ; New York : New York, N.Y.: North-Holland Pub. Co. ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1983.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিBarnhill, Robert E., et al. Surfaces in Computer Aided Geometric Design: Proceedings of a Conference Held at Mathematisches Forschungsinstitut Oberwolfach, F.R.G., April 25-30, 1982. North-Holland Pub. Co. ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1983.