Certificated
HYATT REGENCY ISTANBUL ATAKOY
INTERCONTINENTAL ISTANBUL
İstanbul Gönen Hotel
ISTANBUL MARRIOTT HOTEL ASIA
ISTANBUL MARRIOTT HOTEL SISLI
İZMİR MARRIOTT HOTEL
JW MARRIOTT ANKARA
KAYA ISTANBUL FAIR&CONVENTION CENTER
KOLİN HOTEL
LASAGRADA HOTEL
LAZZONI HOTEL
LE MERIDIEN ISTANBUL ETILER
LEGACY OTTOMAN HOTEL
LIONEL HOTEL İSTANBUL
MARTI RESORT
MAXX ROYAL BELEK GOLF RESORT
MERCURE HOTEL ISTANBUL CITY BOSPHORUS
MERSIN HILTONSA
MOVENPICK HOTEL ISTANBUL GOLDEN HORN
MOVENPICK HOTEL MALATYA
NEVALİ HOTEL
NG SAPANCA WELLNESS & CONVENTION
NOVOTEL İSTANBUL BOSPHORUS
OMMER HOTEL
