APA Style
Zeleny, Robert O.. (1990).
The World Book Encyclopedia - Vol 6 .
:
.
Chicago Style
Zeleny, Robert O..
The World Book Encyclopedia - Vol 6.
:
,
1990.
Teks.
MLA Style
Zeleny, Robert O..
The World Book Encyclopedia - Vol 6.
:
,
1990.
Teks.
Turabian Style
Zeleny, Robert O..
The World Book Encyclopedia - Vol 6.
:
,
1990.
Teks.