APA (7e ed.) Bronvermelding

Irving, E. M. (1951). Geologic report on the copper-pyrite deposits of Rapu-Rapu Ilsands, Albay Province, P.I. Bureau of Mines.

Chicago (17e ed.) Bronvermelding

Irving, Earl M. Geologic Report on the Copper-pyrite Deposits of Rapu-Rapu Ilsands, Albay Province, P.I. Manila: Bureau of Mines, 1951.

MLA (9e ed.) Bronvermelding

Irving, Earl M. Geologic Report on the Copper-pyrite Deposits of Rapu-Rapu Ilsands, Albay Province, P.I. Bureau of Mines, 1951.