APA Style
BALL, W, R.
(1949).
MATHEMATICAL RECREATIONS & ESSAYS
(
Ke dua puluh tiga)
.
London:
Gramedia Pustaka Utama.
MLA Style
BALL, W.W, ROUSE.
"MATHEMATICAL RECREATIONS & ESSAYS".
Ke dua puluh tiga
London:
Gramedia Pustaka Utama,
1949.
Text.