From Amsterdam Schiphol airport you can take a train to the apartment.

You can plan your train trip on this website: www.ns.nl ( you are leaving from "Amsterdam Schiphol'' to ''Amsterdam Central Station'')

When you arrive at Amsterdam Central Station, go to the exit and find the tram station that is located right in front of the building of Central station. there you can take tram 7 or tram 17, they both take you to the apartment.