Gaya APA
FERGUSON, J, H., McHENRY, D, E. (1963).
The american gfederal government (Seventh edition).
United States of America:
MxGraw Hill.
Gaya MLA
FERGUSON, John, H.., McHENRY, Dean, E..
"The american gfederal government".
Seventh edition
United States of America:
MxGraw Hill,
1963.
Buku.