Gaya APA
Mitchell, G, E.
(1992).
E-BOOK : HOW TO START A TOUR GUIDING BUSINESS
.
USA:
The GEM Group, Ltd..
Gaya MLA
Mitchell, G., E..
"E-BOOK : HOW TO START A TOUR GUIDING BUSINESS".
USA:
The GEM Group, Ltd.,
1992.
Text.