(1978). Coal: The other energy [kasetvideo]. Washington, D C : National Audio Visual Center.
Chicagoスタイル(17版)引用形式Coal: The Other Energy [kasetvideo]. Washington, D C : National Audio Visual Center, 1978.
MLA(9版)引用形式Coal: The Other Energy [kasetvideo]. Washington, D C : National Audio Visual Center, 1978.
警告: この引用は必ずしも正確ではありません.