I'm a novice piano player and still have occasional difficulty reading some pieces of sheet music and translating that into practice. Below are two measures of a piece I'm currently trying to learn:
Full Sheet Music: http://puu.sh/pb5Cf/5bcc66b7e9.pdf
My intuition tells me that this should be played with the D held down for the measure, followed by playing the dotted A quarter note and A quarter note as usual. A lot of my confusion with this comes from a performance I see following this sheet music () which looks like the person is alternating between D and A for the measure, and then in the next one A and E.