एपीए उद्धरण

Heady, E. O., & Hexem, R. W. (1978). Water production functions for irrigated agriculture. Iowa State University Press.

शिकागो स्टाइल उद्धरण

Heady, E O., और R W. Hexem. Water Production Functions for Irrigated Agriculture. Iowa: Iowa State University Press, 1978.

एमएलए उद्धरण

Heady, E O., और R W. Hexem. Water Production Functions for Irrigated Agriculture. Iowa State University Press, 1978.