APA (7th ed.) Citation

Forest, J. (1977). In-situ measuring techniques for pile length. [publisher not identified].

Chicago Style (17th ed.) Citation

Forest, J.B. In-situ Measuring Techniques for Pile Length. [Place of publication not identified]: [publisher not identified], 1977.

MLA (9th ed.) Citation

Forest, J.B. In-situ Measuring Techniques for Pile Length. [publisher not identified], 1977.