Dyfyniad APA
ebrary, Inc, & Robertson, G. P. (1999). Standard soil methods for long-term ecological research. Oxford University Press.
Dyfyniad Arddull Chicago
ebrary, Inc, and G. P. Robertson. Standard Soil Methods for Long-term Ecological Research. New York: Oxford University Press, 1999.
Dyfyniad MLA
ebrary, Inc, and G. P. Robertson. Standard Soil Methods for Long-term Ecological Research. Oxford University Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.