Gaya APA
SUHARDO, R, I. (2010).
Operasional di Padi Café Food and Beverage Service Hotel Saphir Yogyakarta .
Surakarta:
STP Sahid Surakarta.
Gaya MLA
SUHARDO, Retno, Indryana.
"Operasional di Padi Café Food and Beverage Service Hotel Saphir Yogyakarta".
Surakarta:
STP Sahid Surakarta,
2010.
Text.