Gaya APA
SPIEGELMAN, M.
(1955).
Introduction to demography
(
1, Cet. 1)
.
Chicago:
The Society of Actuaries.
Gaya MLA
SPIEGELMAN, Mortimer.
"Introduction to demography".
1, Cet. 1
Chicago:
The Society of Actuaries,
1955.
Buku.