APA (7th ed.) Citation

Philippines. National Historical Institute & National Historical Institute. (1996). Historical calendar (1521-1969). The Institute.

Chicago Style (17th ed.) Citation

Philippines. National Historical Institute and National Historical Institute. Historical Calendar (1521-1969). Manila: The Institute, 1996.

MLA (9th ed.) Citation

Philippines. National Historical Institute and National Historical Institute. Historical Calendar (1521-1969). The Institute, 1996.

Warning: These citations may not always be 100% accurate.