Gaya APA
Weeks, J, R. (19..).
Population : an introductin to concepts and issues (3rd.ed.).
Belmont, California:
Wadsworth Pub. Co..
Gaya MLA
Weeks, John, R.
"Population : an introductin to concepts and issues".
3rd.ed.
Belmont, California:
Wadsworth Pub. Co.,
19...
Text.