Não informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Philippine Abstracts. Manila: National Institute of Science and Technology, Division of Documentation.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.