Gaya APA
Shapp, M, , G.
(1997).
The New Book Of Knowledge 4
.
U.S.A:
Grolier Inorporated.
Gaya MLA
Shapp, Martha, , Glauber.
"The New Book Of Knowledge 4".
U.S.A:
Grolier Inorporated,
1997.
Text.