Não informado. (2001). Annual Report on Essential Oils Aromatic Chemicals and Related Materials. Schimmel.
Citação do estilo Chicago (17ª ed.)Não informado. Annual Report on Essential Oils Aromatic Chemicals and Related Materials. New York: Schimmel, 2001.
Citação MLA (8ª ed.)Não informado. Annual Report on Essential Oils Aromatic Chemicals and Related Materials. Schimmel, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.