Cita APA (7th ed.)
Grego, P. (2008). Venus and Mercury, and How to Observe Them. Springer New York. https://doi.org/10.1007/978-0-387-74286-1
Cita Chicago (17th ed.)
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.
Cita MLA (9th ed.)
Grego, Peter. Venus and Mercury, and How to Observe Them. Springer New York, 2008. https://doi.org/10.1007/978-0-387-74286-1.
Atenció: Aquestes cites poden no estar 100% correctes.