Gaya APA
May, K.
(2001).
Malam Natal di Rocky Mountains Vol.6
.
Jakarta:
KPG (Kepustakaan Populer Gramedia).
Gaya MLA
May, Karl.
"Malam Natal di Rocky Mountains Vol.6".
Jakarta:
KPG (Kepustakaan Populer Gramedia),
2001.
Text / Book.