Gaya APA
Sargent welch. (sa).
USA:
International Heartquarters.
Gaya Chicago
Sargent welch.
.
USA:
International Heartquarters,
sa.
Buku.
Gaya MLA
Sargent welch.
.
USA:
International Heartquarters,
sa.
Buku.
Gaya Turabian
Sargent welch.
USA:
International Heartquarters,
sa.
Buku.