Gaya APA
Gray, William S. (1996).
Hotel and motel management and operations .
Singapore:
Prentice-Hall International.
Gaya Chicago
Gray, William S.
Hotel and motel management and operations.
Singapore:
Prentice-Hall International,
1996.
Tesis.
Gaya MLA
Gray, William S.
Hotel and motel management and operations.
Singapore:
Prentice-Hall International,
1996.
Tesis.
Gaya Turabian
Gray, William S.
Hotel and motel management and operations.
Singapore:
Prentice-Hall International,
1996.
Tesis.