APA (7th ed.) Citation

Hardy, B. W. (1961). A convergence method for absorbers. [publisher not identified].

Chicago Style (17th ed.) Citation

Hardy, Bennett Wilson. A Convergence Method for Absorbers. [College Station, Tex.]: [publisher not identified], 1961.

MLA (9th ed.) Citation

Hardy, Bennett Wilson. A Convergence Method for Absorbers. [publisher not identified], 1961.