Gaya APA
Shapp, M, , G.
(1997).
The New Book of Knowledge 15
(
Vol. 15)
.
United States:
Grolier Incorporated.
Gaya MLA
Shapp, Martha, , Glauber.
"The New Book of Knowledge 15".
Vol. 15
United States:
Grolier Incorporated,
1997.
Text.