How to input Cell reference inside a {}

I was trying to make these {"MOOE-LIQUIDATED","MOOE-DOWNLOADED","GAD-LIQUIDATED","CANCELLED"} to be inputted with Cell reference on A1, A2, A3, A4 but it gives me error if I change it.

PHP Code: 

{=IFERROR(INDEX(MOOE!$A$5:$DA$600,SMALL(IF((INDEX(MOOE!$A$5:$DA$600,,9)=$D$8)*(INDEX(MOOE!$A$5:$DA$600,,1)>=$D$9)*(INDEX(MOOE!$A$5:$DA$600,,1)<=$F$9)*(INDEX(MOOE!$A$5:$DA$600,,48)={"MOOE-LIQUIDATED","MOOE-DOWNLOADED","GAD-LIQUIDATED","CANCELLED"}),MATCH(ROW(MOOE!$A$5:$A$600),ROW(MOOE!$A$5:$A$600)),""),ROWS($A$1:A1)),COLUMNS($A$1:A1)),"")} 


into

PHP Code: 

{=IFERROR(INDEX(MOOE!$A$5:$DA$600,SMALL(IF((INDEX(MOOE!$A$5:$DA$600,,9)=$D$8)*(INDEX(MOOE!$A$5:$DA$600,,1)>=$D$9)*(INDEX(MOOE!$A$5:$DA$600,,1)<=$F$9)*(INDEX(MOOE!$A$5:$DA$600,,48)={A1,A2,A3,A4}),MATCH(ROW(MOOE!$A$5:$A$600),ROW(MOOE!$A$5:$A$600)),""),ROWS($A$1:A1)),COLUMNS($A$1:A1)),"")} 


That portion means that either of the following somewhat related to OR function.

If you have continius range then {A1,A2,A3,A4} is A1:A4
Or you can use CHOOSE({1,2,3,4},A1,A2,A3,A4).
Last one could be use for any set such as A1,C22,D34,V45
CHOOSE({1,2,3,4},A1,C22,D34,V45)
Please use appropriate separator for horizontal or vertical array.