How do I extract the oil from citrus fruits without buying the expensive machine?

I need to know so that I can make a nice perfume for my girlfriend. I know where to get the other oils I need, but they don't have citrus oils. Any answers would be nice.How do I extract the oil from citrus fruits without buying the expensive machine?
1) Soak the rinds in water along with the pith.


2) Turn the pieces inside out and squeeze them by hand to break the cell walls


3) Leave on top of a sponge to absorb the oil drops


4) When it saturates, squeeze the sponge into a container.


5) Decant the oil from the top of the water.

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