एपीए उद्धरण

Keith, L. H. (1991). Environmental sampling and analysis, A Practical guide.

शिकागो स्टाइल उद्धरण

Keith, Lawrence H. Environmental Sampling and Analysis, A Practical Guide. London, Lewis Publishers, 1991.

एमएलए उद्धरण

Keith, Lawrence H. Environmental Sampling and Analysis, A Practical Guide. 1991.