APA Citation

OBrien, J. J., & Zilly, R. G. (1971). Contractors management handbook.

Chicago Style Citation

OBrien, James J., and Robert G. Zilly. Contractors Management Handbook. 1971.

MLA Citation

OBrien, James J., and Robert G. Zilly. Contractors Management Handbook. 1971.

Warning: These citations may not always be 100% accurate.