APA (7 ম সংস্করণ) উদ্ধৃতি

Portland Cement Association. (1959). Coefficients for design of cylindrical concrete shell roofs (2nd ed.). Portland Cement Assoc..

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Portland Cement Association. Coefficients for Design of Cylindrical Concrete Shell Roofs. 2nd ed. Skokie, Ill.: Portland Cement Assoc., 1959.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Portland Cement Association. Coefficients for Design of Cylindrical Concrete Shell Roofs. 2nd ed. Portland Cement Assoc., 1959.