Gaya APA
Boehm, R, G. et al (2010).
EXPLORING OUR WORLD People, Place, and Cultures (CET 1).
United States of America:
GLENOE.
Gaya MLA
Boehm, Richard, G.. et al.
"EXPLORING OUR WORLD People, Place, and Cultures".
CET 1
United States of America:
GLENOE,
2010.
Text.