Gaya APA
Dirrect Current Machinery. (1948).
New York:
The macmillan company.
Gaya Chicago
Dirrect Current Machinery.
Ed.Revisi, Cet.8.
New York:
The macmillan company,
1948.
.
Gaya MLA
Dirrect Current Machinery.
Ed.Revisi, Cet.8.
New York:
The macmillan company,
1948.
.
Gaya Turabian
Dirrect Current Machinery.
New York:
The macmillan company,
1948.
.