Gaya APA
Williams, J.
(1991).
The Reference Shelf
(
Cet.1)
.
London and New York:
The H.W.Wilson Company.
Gaya MLA
Williams, Jeanne.
"The Reference Shelf".
Cet.1
London and New York:
The H.W.Wilson Company,
1991.
Koleksi Elektronik.