Cita APA (7th ed.)

Robertson, G. P. (1999). Standard soil methods long term ecological research. Oxford University Press.

Cita Chicago (17th ed.)

Robertson, G. Philip. Standard Soil Methods Long Term Ecological Research. New York: Oxford University Press, 1999.

Cita MLA (9th ed.)

Robertson, G. Philip. Standard Soil Methods Long Term Ecological Research. Oxford University Press, 1999.