Certificated
NAZ CITY HOTEL
NİDYA HOTEL GALATAPORT
NIPPON HOTEL
NOVOTEL
NOVOTEL KAYSERİ
OCCIDENTAL TAKSİM HOTEL
ORAN HOTEL
ORKA ROYAL HOTEL
PORT BOSPHORUS HOTEL
RADISSON BLU HOTEL İSTANBUL PERA
RAMADA BY WYNDHAM İSTANBUL GOLDEN HORN
RAMADA ENCORE BAYRAMPAŞA
RAMADA ISTANBUL OLD CITY
RAMADA İSTANBUL TAKSİM
RICHMOND HOTEL İSTANBUL
RICHMOND PAMUKKALE
RİVA HOTEL
ROX HOTEL ÇOBANÇEŞME
SELÇUK OTEL ŞEMS-İ TEBRİZİ
SELGE BEACH RESORT
SKALION HOTEL
SV BUSINESS HOTEL
TAKSİM GÖNEN HOTEL
TAKSİM SQUARE HOTEL
