Não informado. (1907). Philippine Journal of Science. National Science Development Board.
Cita Chicago Style (17a ed.)Não informado. Philippine Journal of Science. Manila: National Science Development Board, 1907.
Cita MLA (8a ed.)Não informado. Philippine Journal of Science. National Science Development Board, 1907.
Precaución: Estas citas no son 100% exactas.