Gaya APA
WEEKS, J, R. (1986).
POPULATION AN INTRODUCTION TO CONCEPTS AND ISSUES (3rd).
Belmont, California:
Wadsworth Publishing Company.
Gaya MLA
WEEKS, John, R..
"POPULATION AN INTRODUCTION TO CONCEPTS AND ISSUES".
3rd
Belmont, California:
Wadsworth Publishing Company,
1986.
Textbook.