Scheerer, O., & Schadenberg, A. (1923). Alexander Schadenberg, his life and work in the Philippines. Manila.
Citazione stile Chigago Style (17a edizione)Scheerer, Otto, e Alexander Schadenberg. Alexander Schadenberg, His Life and Work in the Philippines. Bureau of Science of the Philippine Government: Manila, 1923.
Citatione MLA (9a ed.)Scheerer, Otto, e Alexander Schadenberg. Alexander Schadenberg, His Life and Work in the Philippines. Manila, 1923.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.