Gaya APA
Paulden, Sydney. (1971).
Hardy Heating International .
London:
BBC Publication.
Gaya Chicago
Paulden, Sydney.
Hardy Heating International.
London:
BBC Publication,
1971.
Buku Teks.
Gaya MLA
Paulden, Sydney.
Hardy Heating International.
London:
BBC Publication,
1971.
Buku Teks.
Gaya Turabian
Paulden, Sydney.
Hardy Heating International.
London:
BBC Publication,
1971.
Buku Teks.