Gaya APA
Gerber, Jerry. (1989).
Life-trends Your Future For The Next 30 Years .
New York:
AVONS BOOK.
Gaya Chicago
Gerber, Jerry.
Life-trends Your Future For The Next 30 Years.
New York:
AVONS BOOK,
1989.
.
Gaya MLA
Gerber, Jerry.
Life-trends Your Future For The Next 30 Years.
New York:
AVONS BOOK,
1989.
.
Gaya Turabian
Gerber, Jerry.
Life-trends Your Future For The Next 30 Years.
New York:
AVONS BOOK,
1989.
.