Irving, E. M. (1951). Geologic report on the copper-pyrite deposits of Rapu-Rapu Ilsands, Albay Province, P.I. Bureau of Mines.
Citazione stile Chigago Style (17a edizione)Irving, Earl M. Geologic Report on the Copper-pyrite Deposits of Rapu-Rapu Ilsands, Albay Province, P.I. Manila: Bureau of Mines, 1951.
Citatione MLA (9a ed.)Irving, Earl M. Geologic Report on the Copper-pyrite Deposits of Rapu-Rapu Ilsands, Albay Province, P.I. Bureau of Mines, 1951.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.