Gaya APA
Gray, William S., Liguori, Salvatore C.. (1990).
Hotel and motel management and operations (2nd ed).
New Jersey:
Prentice Hall.
Gaya Chicago
Gray, William S., Liguori, Salvatore C..
Hotel and motel management and operations.
2nd ed
New Jersey:
Prentice Hall,
1990.
BUKU.
Gaya MLA
Gray, William S., Liguori, Salvatore C..
Hotel and motel management and operations.
2nd ed
New Jersey:
Prentice Hall,
1990.
BUKU.
Gaya Turabian
Gray, William S., Liguori, Salvatore C..
Hotel and motel management and operations.
2nd ed
New Jersey:
Prentice Hall,
1990.
BUKU.