APA Style
Worldwide tours. (1990).
New Jersey:
Prentice Hall.
Chicago Style
Worldwide tours.
.
New Jersey:
Prentice Hall,
1990.
.
MLA Style
Worldwide tours.
.
New Jersey:
Prentice Hall,
1990.
.
Turabian Style
Worldwide tours.
New Jersey:
Prentice Hall,
1990.
.