Gaya APA
Heer, David M., Grigsby, Jill S.. (1992).
Society and population (3rd ed).
Englewood Cliffs, NJ:
Prentice Hall.
Gaya Chicago
Heer, David M., Grigsby, Jill S..
Society and population.
3rd ed
Englewood Cliffs, NJ:
Prentice Hall,
1992.
Text.
Gaya MLA
Heer, David M., Grigsby, Jill S..
Society and population.
3rd ed
Englewood Cliffs, NJ:
Prentice Hall,
1992.
Text.
Gaya Turabian
Heer, David M., Grigsby, Jill S..
Society and population.
3rd ed
Englewood Cliffs, NJ:
Prentice Hall,
1992.
Print.