Cita APA (7th ed.)

Pierce, F. J., & Clay, D. (2007). GIS Applications in Agriculture. CRC Press.

Cita Chicago (17th ed.)

Pierce, Francis J., i David Clay. GIS Applications in Agriculture. Boca Raton: CRC Press, 2007.

Cita MLA (9th ed.)

Pierce, Francis J., i David Clay. GIS Applications in Agriculture. CRC Press, 2007.