Wenner, Jennifer M. “Big Numbers and Scientific Notation”. Teaching Quantitative Skills in the Geosciences. University of Wisconsin-Oshkosh. Truy cập ngày 26 tháng 12 năm 2009.
justjoules.org
"The mixture of terms for essentially one entity (energy) leads to confusion, especially among citizens who need to be aware, now more than ever, of energy consumption patterns." http://www.justjoules.org/Lưu trữ 2020-07-15 tại Wayback Machine
"The mixture of terms for essentially one entity (energy) leads to confusion, especially among citizens who need to be aware, now more than ever, of energy consumption patterns." http://www.justjoules.org/Lưu trữ 2020-07-15 tại Wayback Machine
