(1991). Environmental directions. [sound recording]. 1991-12-29, no. 744.
Chicagoスタイル(17版)引用形式Environmental Directions. [sound Recording]. 1991-12-29, No. 744. 1991.
MLA(9版)引用形式Environmental Directions. [sound Recording]. 1991-12-29, No. 744. 1991.
警告: この引用は必ずしも正確ではありません.