Dyfyniad APA
Preston, C. J., & Ouderkirk, W. (2007). Nature, Value, Duty: Life on Earth with Holmes Rolston, III. Springer Netherlands. https://doi.org/10.1007/1-4020-4878-5
Dyfyniad Arddull Chicago
Preston, Christopher J., and Wayne Ouderkirk. Nature, Value, Duty: Life on Earth with Holmes Rolston, III. Dordrecht: Springer Netherlands, 2007. https://doi.org/10.1007/1-4020-4878-5.
Dyfyniad MLA
Preston, Christopher J., and Wayne Ouderkirk. Nature, Value, Duty: Life on Earth with Holmes Rolston, III. Springer Netherlands, 2007. https://doi.org/10.1007/1-4020-4878-5.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.