Não informado. (2008). Trees in South Africa. Tree Society of Southern Africa.
Chicagoスタイル(17版)引用形式Não informado. Trees in South Africa. Johannesburg, Africa do Sul: Tree Society of Southern Africa, 2008.
MLA(8版)引用形式Não informado. Trees in South Africa. Tree Society of Southern Africa, 2008.
警告: この引用は必ずしも正確ではありません.