APA (7th ed.) Citation
Parker, D. (1989). Research needs regarding how to reach the poor through groundwater irrigation: A preliminary discussion.
Chicago Style (17th ed.) Citation
Parker, D.E. Research Needs Regarding How to Reach the Poor Through Groundwater Irrigation: A Preliminary Discussion. 1989.
MLA (9th ed.) Citation
Parker, D.E. Research Needs Regarding How to Reach the Poor Through Groundwater Irrigation: A Preliminary Discussion. 1989.
Warning: These citations may not always be 100% accurate.