APA (7th ed.) Citation

Intermediate Technology Publications, Collett, J., & Boyd, J. (1980). Eight simple surveying levels. Intermediate Technology Publications.

Chicago Style (17th ed.) Citation

Intermediate Technology Publications, J. Collett, and John Boyd. Eight Simple Surveying Levels. London: Intermediate Technology Publications, 1980.

MLA (8th ed.) Citation

Intermediate Technology Publications, et al. Eight Simple Surveying Levels. Intermediate Technology Publications, 1980.