Gaya APA
Mathews, B, P. ().
the sophe heritage collection of health education monographs vol 2 (3).
California-USA:
the Society for Public Health Education, Inc.
Gaya MLA
Mathews, Betty, P..
"the sophe heritage collection of health education monographs vol 2".
3
California-USA:
the Society for Public Health Education, Inc,
.
Kesehatan Masyarakat.