Dyfyniad APA
ebrary, Inc, Wright, H. E., Coffin, B., & Aaseng, N. E. (1992). The patterned peatlands of Minnesota. University of Minnesota Press.
Dyfyniad Arddull Chicago
ebrary, Inc, H. E. Wright, Barbara Coffin, and Norman E. Aaseng. The Patterned Peatlands of Minnesota. Minneapolis: University of Minnesota Press, 1992.
Dyfyniad MLA
ebrary, Inc, et al. The Patterned Peatlands of Minnesota. University of Minnesota Press, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.