Dyfyniad APA
Grego, P. (2008). Venus and Mercury, and How to Observe Them. Springer New York. https://doi.org/10.1007/978-0-387-74286-1
Dyfyniad Arddull Chicago
Grego, Peter. Venus and Mercury, and How to Observe Them. New York, NY: Springer New York, 2008. https://doi.org/10.1007/978-0-387-74286-1.
Dyfyniad MLA
Grego, Peter. Venus and Mercury, and How to Observe Them. Springer New York, 2008. https://doi.org/10.1007/978-0-387-74286-1.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.