APA (7th ed.) Citation

Geospace Engineering Co, Jeffery, C. B., & Andrews, A. G. (1971). The position finder: The principles of electronic survey position finding, and a directory of position finding systems (2d ed.). [publisher not identified].

Chicago Style (17th ed.) Citation

Geospace Engineering Co, C. B. Jeffery, and A. G. Andrews. The Position Finder: The Principles of Electronic Survey Position Finding, and a Directory of Position Finding Systems. 2d ed. Ottawa, Canada: [publisher not identified], 1971.

MLA (9th ed.) Citation

Geospace Engineering Co, et al. The Position Finder: The Principles of Electronic Survey Position Finding, and a Directory of Position Finding Systems. 2d ed. [publisher not identified], 1971.