Gaya APA

Michelli, J, A., Wijaya, M. (2009). The New Gold Standard=Layanan Bintang Lima The Ritz-Carlton Hotel Company . Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Michelli, Joseph, A., Wijaya, Martha. "The New Gold Standard=Layanan Bintang Lima The Ritz-Carlton Hotel Company". Jakarta: Gramedia Pustaka Utama, 2009. Book.