APA (7th ed.) Citation

U. S. National Bureau of Standards. (1961). Tables of thr exponential function ex (4th ed.). U. S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

U. S. National Bureau of Standards. Tables of Thr Exponential Function Ex. 4th ed. Washington: U. S. Govt. Print. Off, 1961.

MLA (9th ed.) Citation

U. S. National Bureau of Standards. Tables of Thr Exponential Function Ex. 4th ed. U. S. Govt. Print. Off, 1961.