How are coordinates and cardinal points defined on on Earth's Moon? [duplicate]

I came across this page - http://www.hq.nasa.gov/alsj/alsjcoords.html that mentions the various landing coordinates of of NASA missions on the Earth's moon. The cordinates are given in the same way as that of the Earth N/S & E/W.

I understand that the moon does not have a molten core and therefore cannot have a magnetic North or South. So how is the coordinate system created?

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marked as duplicate by James Jenkins, TildalWave♦Feb 4 at 2:50

Repeated question: space.stackexchange.com/questions/3207/… –  Mark Adler Feb 3 at 19:22
Note that Earth's coordinate system has nothing to do with its magnetic field. –  Mark Adler Feb 3 at 22:15

Latitude:   3° 12' 43.2" South