Não informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
Citação do estilo Chicago (17ª ed.)Não informado. Philippine Abstracts. Manila: National Institute of Science and Technology, Division of Documentation.
Citação MLA (8ª ed.)Não informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.