Tohutoro APA (7th ed.)
Grego, P. (2008). Venus and Mercury, and how to observe them. Springer.
Tohutoru Kātū Chicago (17th ed.)
Grego, Peter. Venus and Mercury, and How to Observe Them. New York: Springer, 2008.
Tohutoro MLA (9th ed.)
Grego, Peter. Venus and Mercury, and How to Observe Them. Springer, 2008.
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