Certificated
THE PARMA HOTEL TAKSİM (GRAND PARMA)
THE RITZ-CARLTON ISTANBUL
THE SOFA HOTEL
THE ST. REGIS ISTANBUL
TİLİA HOTEL
TITANIC BUSINESS GOLDEN HORN HOTEL
TITANIC BUSINESS KARTAL
TITANIC CITY HOTEL
TITANIC COMFORT ŞİŞLİ HOTEL
TITANIC PORT BAKIRKOY
TOPKAPI INTER ISTANBUL HOTEL
TROYA HOTEL BALAT
TURYİD- TURIZM RESTAURANT YATIRIMCILARI VE İŞLETMECILERI DERNEĞI
TÜYAP PALAS HOTEL
ULUDAĞ ET LOKANTASI
ULUKARDEŞLER
USLAN HOTEL ULUDAĞ
VALİDE SULTAN KONAĞI
W İSTANBUL
WAXWING HOTEL
Wish More Hotel İstanbul
WOW İstanbul Hotel
WOW İSTANBUL HOTEL AIRPORT
Wyndham Grand İstanbul Europe