Não informado. (1972). Ground water newsletter. Water Information Center.
Chicagoスタイル(17版)引用形式Não informado. Ground Water Newsletter. Washington: Water Information Center, 1972.
MLA(8版)引用形式Não informado. Ground Water Newsletter. Water Information Center, 1972.
警告: この引用は必ずしも正確ではありません.