Gaya APA
Smith, D, P., Keyfitz, N. (2013).
Mathematical Demography (2nd ed. 2013).
Springer Berlin Heidelberg:
Springer.
Gaya MLA
Smith, David, P.., Keyfitz, Nathan.
"Mathematical Demography".
2nd ed. 2013
Springer Berlin Heidelberg:
Springer,
2013.
E-Book.