Gaya APA
Middleton, V, T, C., wkins, R, H. (1998).
EBOOK : SUSTAINABLE TOURISM : A MARKETING PERSPECTIVE .
Oxford:
Butterworth-Heinemann.
Gaya MLA
Middleton, Victor, T., C.., wkins, Rebecca, Ha.
"EBOOK : SUSTAINABLE TOURISM : A MARKETING PERSPECTIVE".
Oxford:
Butterworth-Heinemann,
1998.
Text.