Não informado. (2008). Trees in South Africa. Tree Society of Southern Africa.
Style de citation Chicago (17e éd.)Não informado. Trees in South Africa. Johannesburg, Africa do Sul: Tree Society of Southern Africa, 2008.
Style de citation MLA (8e éd.)Não informado. Trees in South Africa. Tree Society of Southern Africa, 2008.
Attention : ces citations peuvent ne pas être correctes à 100%.