Hogan, M. S., Wiggers, C., & Wiggers, L. (1998). The ultimate geography and time line guide. United States of America: GeoCreations.
استشهاد بنمط شيكاغوHogan, Maggie S., Cindy Wiggers, and Liberty Wiggers. The Ultimate Geography and Time Line Guide. United States of America: GeoCreations, 1998.
MLA استشهادHogan, Maggie S., Cindy Wiggers, and Liberty Wiggers. The Ultimate Geography and Time Line Guide. United States of America: GeoCreations, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.