Comyn, T. d., & Walton, W. (1974). State of the Philippine Islands: Being an historical statistical and descriptive account of that interesting portion of the Indian Archipelago, from the Spanish with notes and a preliminary discourse, by William Walton [microform]. Photoduplication Service.
Chicago Style (17. basım) AtıfComyn, Tomas de, ve William Walton. State of the Philippine Islands: Being an Historical Statistical and Descriptive Account of That Interesting Portion of the Indian Archipelago, from the Spanish with Notes and a Preliminary Discourse, by William Walton [microform]. Quezon City: Photoduplication Service, 1974.
MLA (9th ed.) AtıfComyn, Tomas de, ve William Walton. State of the Philippine Islands: Being an Historical Statistical and Descriptive Account of That Interesting Portion of the Indian Archipelago, from the Spanish with Notes and a Preliminary Discourse, by William Walton [microform]. Photoduplication Service, 1974.