EXCEL- ='16th'!F18 how to write with IF blank leave blank instead of returning 0

have this formula ='16th'!F18 in sheet 1 cell C18

16th is the sheet
F18 is the cell i want to copy which is empty but the formula returns 0 in cell C18.
I want it to be blank ("")
How would i write this.
I can do it when it doesnt have a different sheet but cant get it to work with a different sheet involved

I am a novice and learning and need help. So close to getting everything to work on this workbook. All help is appreciated please explain things in simple terms.

Thanks again

Thanks Paul but i ending up finding this before you replied

=IF(NOT(ISBLANK('16th'!F18)), '16th'!F18, "")