APA-referens (7:e uppl.)

Royama, M., Friend, T., & Takeuchi, T. 1. (1967). The Philippine polity: A Japanese view. Yale University, Southeast Asia Studies.

Chicago-referens (17:e uppl.)

Royama, Masamichi, Theodore Friend, och Tatsuji 1904 Takeuchi. The Philippine Polity: A Japanese View. [New Haven]: Yale University, Southeast Asia Studies, 1967.

MLA-referens (9:e uppl.)

Royama, Masamichi, et al. The Philippine Polity: A Japanese View. Yale University, Southeast Asia Studies, 1967.