Gaya APA
JOHNSON, E., KROOS, H, E, , , , .
(1960).
The American economy :
.
Englewood Cliffs, N.J.:
Prentice Hall.
Gaya MLA
JOHNSON, E.A.J.., KROOS, Herman, E., , , , .
"The American economy :".
Englewood Cliffs, N.J.:
Prentice Hall,
1960.
Buku.