Certificated
OTTOMAN'S LIFE HOTEL DELUXE
PARK DEDEMAN ESKİŞEHİR
POINT HOTEL
POINT HOTEL BARBAROS
POLAT ERZURUM RESORT HOTEL
RADISSON BLU BOSPHORUS HOTEL
RADISSON BLU HOTEL İSTANBUL OTTOMARE
RADISSON BLU HOTEL ISTANBUL SISLI
RADISSON BLU HOTEL KAYSERI
RADISSON BLU HOTEL VADİSTANBUL
RAFFLES İSTANBUL
RAMADA HOTELS&SUITES İSTANBUL MERTER
RAMADA PLAZA ISTANBUL BY WYNDHAM ISTANBUL CITY CENTER
RAMADA PLAZA ISTANBUL TEKSTILKENT
RAMADA PLAZA IZMIT
RAMADA TEKIRDAG HOTEL
RICHMOND NUA WELLNESS SPA
SHANGRI LA BOSPHORUS İSTANBUL
SHERATON BURSA HOTEL - ALOFT BURSA
SHERATON GRAND İSTANBUL ATAŞEHİR HOTEL
SHERATON ISTANBUL ATAKOY
SHERATON İSTANBUL CITY CENTER
SHERATON İSTANBUL LEVENT
SILENCE HOTEL İSTANBUL (DOUBLETREE BY HILTON ATAŞEHİR & CONFERENCE CENTER)
