Gaya APA
Martin, A, M.
(1987).
Hari Istimewa Kristy = The Baby Sitters Club #6;
.
Jakarta:
Pt.Gramedia Pustaka Utama.
Gaya MLA
Martin, Ann, M..
"Hari Istimewa Kristy = The Baby Sitters Club #6;".
Jakarta:
Pt.Gramedia Pustaka Utama,
1987.
Buku.