"Was Marcus Island Discovered by Bernardo de la Torre in 1543?". The Journal of Pacific History. 39. Ingentaconnect.com: 109–122. 16 June 2006. doi:10.1080/00223340410001684886. S2CID219627973.
"Was Marcus Island Discovered by Bernardo de la Torre in 1543?". The Journal of Pacific History. 39. Ingentaconnect.com: 109–122. 16 June 2006. doi:10.1080/00223340410001684886. S2CID219627973.