Não informado. (2001). Annual report of the Bureau of Science, Philippine Islands. Bureau of Science.
Chicago-Zitierstil (17. Ausg.)Não informado. Annual Report of the Bureau of Science, Philippine Islands. Manila: Bureau of Science, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. Annual Report of the Bureau of Science, Philippine Islands. Bureau of Science, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.