Gaya APA
Servamechanism. (1967).
London:
Addison-Wesley Publishing Co..
Gaya Chicago
Servamechanism.
.
London:
Addison-Wesley Publishing Co.,
1967.
Buku.
Gaya MLA
Servamechanism.
.
London:
Addison-Wesley Publishing Co.,
1967.
Buku.
Gaya Turabian
Servamechanism.
London:
Addison-Wesley Publishing Co.,
1967.
Buku.