Gaya APA
dkk, M, M.
(1925).
Mahathir Mohammda The Challenge
.
Medan:
Pelanduk Publications.
Gaya MLA
dkk, Mahathir, Mohamad,.
"Mahathir Mohammda The Challenge".
Medan:
Pelanduk Publications,
1925.
Buku Teks.