Certificated
ADANA HILTONSA
AJWA HOTELS SULTANAHMET
AKGÜN İSTANBUL HOTEL
ALMİRA HOTEL
ANKARA HILTONSA
BARCELO İSTANBUL HOTEL
BH CONFERENCE & AIRPORT HOTEL İSTANBUL
BYOTELL
ÇINAR HOTEL
ÇIRAĞAN PALACE KEMPINSKI
CONRAD İSTANBUL BOSPHORUS
CROWNE PLAZA İSTANBUL ASIA
CROWNE PLAZA İSTANBUL FLORYA
CROWNE PLAZA İSTANBUL HARBİYE
CROWNE PLAZA İSTANBUL OLD CITY
CROWNE PLAZA İSTANBUL ORYAPARK
DEDEMAN BOSTANCI ISTANBUL HOTEL & CONVENTION CENTER
DEDEMAN ISTANBUL
DEDEMAN ZONGULDAK
DİVAN İSTANBUL
DİVAN ISTANBUL ASIA
Doubletree by Hilton Esentepe
DOUBLETREE BY HILTON HOTEL AVANOS-CAPPADOCIA
DOUBLETREE BY HILTON HOTEL İSTANBUL - MODA
