Gaya APA
Nault, William H., Groman, Jeff. (1992).
The World Book Encyclopedia, Volume 21: W - X - Y - Z .
London:
World Book, Inc..
Gaya Chicago
Nault, William H., Groman, Jeff.
The World Book Encyclopedia, Volume 21: W - X - Y - Z.
London:
World Book, Inc.,
1992.
Text.
Gaya MLA
Nault, William H., Groman, Jeff.
The World Book Encyclopedia, Volume 21: W - X - Y - Z.
London:
World Book, Inc.,
1992.
Text.
Gaya Turabian
Nault, William H., Groman, Jeff.
The World Book Encyclopedia, Volume 21: W - X - Y - Z.
London:
World Book, Inc.,
1992.
Print.