Discovery Channel School. (2005). Rocks and minerals (version 2.0.). Discovery Channel School.
Chicagoスタイル(17版)引用形式Discovery Channel School. Rocks and Minerals. version 2.0. s.l: Discovery Channel School, 2005.
MLA(9版)引用形式Discovery Channel School. Rocks and Minerals. version 2.0. Discovery Channel School, 2005.
警告: この引用は必ずしも正確ではありません.