Não informado. (1961). Forestry in South Africa. Department of Forestry.
Chicagoスタイル(17版)引用形式Não informado. Forestry in South Africa. Pretoria, Africa do Sul: Department of Forestry, 1961.
MLA(8版)引用形式Não informado. Forestry in South Africa. Department of Forestry, 1961.
警告: この引用は必ずしも正確ではありません.