APA Style
Helgren, David M., Sager, Robert J., Israel, Saul. (1985).
World Geography Today (Workbook) .
United States of America:
Holt, Rinehart and Winston, Publisher.
Chicago Style
Helgren, David M., Sager, Robert J., Israel, Saul.
World Geography Today (Workbook).
United States of America:
Holt, Rinehart and Winston, Publisher,
1985.
Text.
MLA Style
Helgren, David M., Sager, Robert J., Israel, Saul.
World Geography Today (Workbook).
United States of America:
Holt, Rinehart and Winston, Publisher,
1985.
Text.
Turabian Style
Helgren, David M., Sager, Robert J., Israel, Saul.
World Geography Today (Workbook).
United States of America:
Holt, Rinehart and Winston, Publisher,
1985.
Print.