APA (7th ed.) Citation

Heacock, F. A. (1952). Graphic methods for solving problems. [publisher not identified].

Chicago Style (17th ed.) Citation

Heacock, Frank A. Graphic Methods for Solving Problems. [Princeton? N. J.]: [publisher not identified], 1952.

MLA (9th ed.) Citation

Heacock, Frank A. Graphic Methods for Solving Problems. [publisher not identified], 1952.