APA (7 वां संस्करण) प्रशस्ति पत्र

Lookwood, A. &. R. (2010). Hospitality and tourism operating systems. Cengage Publishing.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Lookwood, Andrew & Rouski. Hospitality and Tourism Operating Systems. Canada: Cengage Publishing, 2010.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Lookwood, Andrew & Rouski. Hospitality and Tourism Operating Systems. Cengage Publishing, 2010.