This guide explains how this is done in the Harvard Style, sometimes called the author-date system. There are two steps to acknowledging your sources: cite your references in the text, to show where you have drawn upon other people's work, and then list them at the end of your work under the heading 'References'.eferencing Referencing means giving a full description of each source you have cited in the text, in a list of references or bibliography, at the end of your work: ï§ Write the list in alphabetical order: put the first authorâs last name first and then his/her initials.
Galileo discovered the 4 moons of jupiter through a telescope which he never invented but was the first to use.
Using the new technology of the telescope, Galileo discovered the moons of Jupiter: Io, Europa, Calisto, and Ganymede, thus proving that not all things orbit around the Earth, lending great support to the Copernican model of the heliocentric system.e was an Italian scientist of the 17th century. He did not prove  the heliocentric theory. But everyone accepts the heliocentric  principle now, after it was proved right; â¦ but that happened long  after Galileo's time, after new scientific discoveries in the  latter half of the 1600s. Geoff Canyon.