Gaya APA

Potrter, H., Drummond, K, E. (1992). Supervision The Hospitality Industry (Cetakan. Kedua). United States of America: John Wiley& Sons, Inc..

Gaya MLA

Potrter, Hary., Drummond, Karen, Eich. "Supervision The Hospitality Industry". Cetakan. Kedua United States of America: John Wiley& Sons, Inc., 1992. BUKU.