Não informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
Chicago-referens (17:e uppl.)Não informado. Philippine Abstracts. Manila: National Institute of Science and Technology, Division of Documentation.
MLA-referens (8:e uppl.)Não informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.